. . . 2007, . |
2007
1
) )
- .
- z = ln (y2-e-x).
- u = ex-2y, , y = t3 t = 0, .
- z = z(x,y), : x3+y3+z3-3xyz = 4, M0 (2,1,1) .
- , .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2+z2+6z-4x+8 = 0, M0(2,1,-1);
) S: 4x2-9y2-9z2-36 = 0, M0(3,0,0).
- z = ln (x+y) . M0(1,3) y2 = 9x x.
- .
- z = 3x+y-xy
D: y = x,y = 4, x = 0.
2
) z = arcsin (x-y), ) z = ln (2-x-y) + .
- .
- z = arctg (x2+y2)
- u = ln (ex+e-y), x = t2, y = t3 t = -1, .
- z = z(x,y), : x2+y2+z2-xy = 2, M0 (-1,0,1) .
- , .
- S M0 (x0,y0,z0). , ), .
) S: x2+z2-4y2 = -2xy, M0(-2,1,2);
) S: x2+y2-z = 6, M0(1,-1,-1).
- z = 5x2-3x-y-1 . M0(2,1) , . 0 . N(5,5).
- z = x3+8y3-6xy+5.
- z = xy-x-2y
D: y = x,y = 0, x = 3.
3
) ; ) z = ln (1-x2-y2)+ .
- (1,03)3,98.
- z = arcsin .
- u = yx, x = ln (t-1), t = 2, .
- z = z(x,y), : , M0 (2,1,-1) .
- , u = ln (x2+(y+1)2) .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2+z2+3z-xy = 7, M0(1,2,1);
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) S: 4x2-9y2 = 36, M0(-3,0,0).
- z = x2+y2 . M0(6,-8) y = x2 x.
- z = 1+15x-2x2-xy-2y2.
- z = x2+8y+2xy-4x
D: y = 0,y = 2, x = 0,x = 1.
4
)z = ln (4-x2-y2); ) z = y + arcsin (x+2).
- cos 59 sin 32.
- z = arccos (x-y2).
- u = ey-2x+2, , y = cos t t = , .
- z = z(x,y), : ez+x+2y+z = 4, M0 (1,1,0)
- , u = xy .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2+z2+6z+4x = 8, M0(-1,1,2);
) S: x2-y+z2-6 = 0, M0(1,-1,2).
- z = arcsin () . M0(5,5) y2 = 5x x.
- z = 1+6x-x2-xy-y2.
- z = 5x2+y2-3xy
D: y = 0,y = 1, x = 0,x = 1.
5
)z = ; ) z = + ln (4-x2-y2).
- artg .
- z = cos (x3-2xy)
- u = x2ey, x = cos t, y = sin t, t = π, .
- z = z(x,y), : x2+y2+z2-z-4 = 0, M0 (1,1,-1) .
- , u = xy/(x+y) .
- S M0 (x0,y0,z0). , ), .
) S:2x2-y2+z2-4x+y = 13, M0(2,1,-1);
) S: 25y2-4x2-4z2-5 = 0, M0(1,1,2).
- z = xey . M0(1,4) xy = 4 x.
- z = x3+y2-6xy-39x+18y+20.
- z = x2+2xy-y2-4x
D: x-y+1 = 0,y = 0, x = 3.
6
) z = ; ) z = (4-x2-y2)+ .
- (2,05)2/((2,05)2+(3,01)2).
- z = .
- u = ln (ex+ey) x = t2, y = t3 t = 1, .
- z = z(x,y), : z3+3xyz+3y = z, M0 (1,1,1) .
- , u = exy .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2+z2-6y+4z+4 = 0, M0(2,1,-1);
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) S: x2+z2-5y2 = 0, M0(-1,1,3).
- z = x2+y2+xy . M0(3,1) 4x-3y-9 = 0 x.
- z = 2x3+2y3-6xy+5.
- z = x2+y2-2x-2y+8
D: y+x-1 = 0,y = 0, x = 0.
7
)z = arccos (x + y); ) z = .
- 0,97 1,05.
- z = arcsin (2x3y).
- u = xy, x = et,y = ln t t = 1, .
- z = z(x,y), : cos 2 x + cos 2y + cos 2z = 1,5 M0 () .
- , u = sin 2(x-ay) .
- S M0 (x0,y0,z0). , ), .
) S: x2+z2-5yz+3y = 46, M0(1,2,-3);
) S: 3x2+y2 = 9, M0(,2 2,1).
- z = xey . M0(2,2) xy = 4 x.
- z = 3x3+3y3-9xy+10.
- z = 2x3-xy2+y2
D: y = 0,y = 6, x = 0,x = 1.
8
)z = ; )z = arcsin (3-x2-y2).
- .
- z = ln (3x2y-y2).
- u = ey-2x, x = sin t, y = t3 t = 0, .
- z = z(x,y), : e z-1 = cos x cos y + 1, M0 (0,π/2,1) .
- , .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2-xz-yz = 0, M0(0,2,2);
) S: x2+y2-4z2 = 4, M0(-2,2,1).
- z = arcsin () . M0(5,5) y2 = 5x x.
- z = x2+xy+y2+x-y+1.
- z = 3x+6y-xy-x2-y2 D: y = 0,y = 1, x = 0,x = 1.
9
)z = ln (x2+y2-3); ) .
- ln ((2,02)2+ ).
- z = e-(x3+y3)y.
- u = x2e-y, x = sin t, y = sin 2t t = , .
- z = z(x,y), : x2+y2+z2-6x = 0, M0 (1,2,1) .
- , .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2-z2+2yz+y-2z = 2, M0(1,1,1);
) S: x2-y2 = 16, M0(5,3,-1).
- z = ln (x2+y2) . M0(1,1) x2+ y2 = 2 x.
- z = 4(x-y)-x2-y2.
- z = x2-2y2+4xy-6x-1 D: x+y = 3,y = 0, x = 0.
10
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)z = ; )z = arcsin + arcsin (1-y).
- .
- z = ln ( -1).
- u = ln (e-x+ey), x = t2, y = t3 t = -1, .
- z = z(x,y), : xy = z2-1, M0 (0,1,-1)
- , u = e - cos (x+ay) .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2 _ z2-2xy+2x = z, M0(1,1,1);
) S: 3x2-11y2+3z2+5 = 0, M0(1,1,1).
- z = x2+y2 . M0(6,8) x2+y2 = 100 x.
- z = 6(x-y)-3x2-3y2.
- z = x2+2xy-10
D: y = 0,y = x2-4.
11
)z = ln (y2-x2); ) z = .
- (3,02)3 .
- z = tg(y4x3).
- u = ey-2x-1, x = cos t, y = sin t t = , .
- z = z(x,y), : x2-2y2+3z2-yz+y = 2, M0 (1,1,1) .
- , u = exy .
- S M0 (x0,y0,z0). , ), .
) S:z = x2+y2+2x-2xy-y, M0(-1,-1,-1);
) S: x2+y2+2z2 = 10, M0(1,1,2).
- . M0() x2+y2 = 2x x.
- z = x2+xy+y2-6x-9y.
- z = xy-2x-y
D: y = 0,y = 4, x = 0,x = 3.
12
)z = ln (9-x2-y2); ) z = arcsin (x+y).
- ln ( ).
- z = 2xy + .
- u = arcsin , x = sin t, y = cos t t = π, .
- z = z(x,y), : x2+y2+z2+2xz = 5, M0 (0,2,1) .
- , arctg .
- S M0 (x0,y0,z0). , ), .
) S: z = y2-x2+2xy-3y, M0(1,-1,1);
) S: x2+y2-4z2 = 1, M0(1,2,-1).
- z = arctg (xy) . M0(1,-1) y = -x x.
- z = (x-2)2+2y2-10.
- z = 0,5x2-xy
D: y = 8, y = 2x2.
13
)z = ; ) z = ln (4+4x-y2).
- (sin 1,56)(cos 1,58).
- z = 2- ln .
- u = arccos (2x / y), x = sin t, y = cos t t =π, .
- z = z(x,y), : x cos y + y cos z + z cos x = , M0 (0, , π) .
- , u = ln (x2+y2+2x+1) .
- S M0 (x0, y0, z0). , ), .
) S: z = x2-y2-2xy-x-2y, M0(-1,1,1);
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) S: x2-5y+z2 = 0, M0(1,2,-3).
- z = arctg . M0(1,1) x2+ y2 = 2x x.
- z = (x-5)2+y2+1
- z = 3x2+3y2-2x-2y+2 D: y + x-1 = 0, y = 0, x = 0.
14
)z = ; ) z = arcsin 3xy.
- 3,1+4,2- .
- z = cos (x- ).
- u = , x = 1-2t,
y = arctg t t = 0, .
- z = z(x,y), : 3x2 y2+2xyz2-2x3z+4y3z = 4, M0 (2,1,2) .
- , u = .
- S M0 (x0,y0,z0). , ), .
) S: x2-2y2+z2+xz-4y = 13, M0(3,1,2);
) S: x2-7y+z2 = 4, M0(3,2,3).
- z = xey . M0(1,1) xy = 1 x.
- z = x3+y3-3xy.
- z = 2x2 + 3y2-1
D: y = , y = 0.
15
) z = arccos (x+2y); ) .
- 3,034+1,985+15.
- .
- u = , x = et, y = 2-e2t t = 0, .
- z = z(x,y), : x2-2y2+z2-4x+2z+2 = 0, M0 (1,1,1) .
- , u = e (x+3y) sin (x+3y) .
- S M0 (x0,y0,z0). , ), .
) S: 4y2-z2+3z+4xy-xz = 9, M0(1,-2,1);
) S: x2-4y2+z2-4 = 0, M0(-2,1,2).
- z = 5x2-3x-y-1 . M0(1,-1) , . N(2,2) .M0.
- z = 2xy-2x2-4y2.
- z = x2-2xy-y2 + 4x + 1 D: y = 0, x+y+1 = 0, x = -3.
16
) z = arcsin ; ) z = ln (y2-x2),
- 2,01∙ 1,03/ ((2,01)4+(2,97)2),
- z = arcos (x-2y2),
- u = ln (e-x +e-2y) x = t2, t = 1, ,
- z = z(x,y), : x+y+z+2 = xyz, M0 (2,-1,-1) ,
- , u = .
- S M0 (x0,y0,z0). , ), .
) S: z = x2+y2-3xy-x+y+2, M0(2,1,0);
) S: x2+y2-z-6 = 0, M0(2,1,-1).
- . M0() x2+ y2+2x = 0 x.
- z = x x2-y+6x+3.
- z = 3x2+3y2-x-y+1
D: x = 5, y = 0, x-y-1 = 0.
17
) z = ln (x2-y2); ) z = arcsin .
- (2- )3,02.
- z = 5xy2+ ln xy2.
- u = , x = ln t, y = t2 t = 1, .
- z = z(x,y), : x2 + y2 + z2-2xz = 2, M0 (0,1,-1) .
- , u = arctg .
- S M0 (x0,y0,z0). , ), .
) S: 2x2-y2+2z2+xz+xy = 3, M0(1,2,1,);
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) S: x2+y2-4z2 = 4, M0(2,-1,1).
- z = arctg (xy) . M0(-1,4) y = -x+3 x.
- z = 2xy-5x2-3y2+2.
- z = 2x2 +2xy-0,5y2-4x D: y = 2x, y = 2, x = 0.
18
) z = ln (x2-y2); ) z =
- tg 46 sin 29.
- .
- u = arcsin , x = sin t, y = cos t t = π, .
- z = z(x,y), : ez-xyz-x+1 = 0, M0 (2,1,0)
- , u = ln (x+e y) .
- S M0 (x0,y0,z0). , ), .
) S: x2-y2+z2-4x+2y = 14, M0(3,1,-4);
) S: x2+y2 = 5z, M0(1,3,2).
- z = x2+y2 . M0(-6,8) y = (2/9)x2 x.
- z = xy(12-x-y).
- z = x2+2,5y2-2xy-2x D: y = 0, y = 2, x = 0,x = 2.
19
) z = -8; ) .
- (2,03)2/ .
- z = y2-4xy+ sin (2xy2).
- u = , , t = 0, .
- z = z(x,y), : x3+2y3+z33xyz-2y-15 = 0, M0 (1,-1,2) .
- , u = ln (x2-y2) .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2-z2+xz+4y = 4, M0(1,1,2);
) S: x2+5y2+z2 = 10, M0(1,-1,2).
- u = x2y2z . 0(2,-1,3) .
- z = xy-x2-y2+9.
- z = xy-3x-2y
D: y = 0, y = 4, x = 0,x = 4.
20
) ; ) .
- 2,03/((2,03)4+(2,97)2).
- z = ln (y-x2-3).
- , x = sin t,y = cos t t = , .
- z = z(x,y), : x2-3y2+z2-2xy+6x-2y-8z+20 = 0, M0 (1,-1,2) .
- , e cos (x+3y) .
- S M0 (x0,y0,z0). , ), .
) S: x2-y2-z2+xz-4x = -5, M0(-2,1,0);
) S: x2-y2+z2 = 30, M0(3,2,5).
- : y2 = 4x x2+y2 = 5 .0(1,2) z = x3+y3 x.
- z = 2xy-3x2-2y2+10.
- z = x2 + xy-2
D: y = 4x2-4, y = 0.
21
) z = ln (3x-y); ) z = .
- 3,09e 0,09.
- z = arcsin (2x-y3)+x.
- u = , x = ln t, y = t2 t = 1, .
- z = z(x,y), : x2+y2+z2 = y-z+3, M0 (1,2,0) .
- , u = ex(x cos y-y sin y) .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2-xz+yz-3x = 11, M0(1,4,-1);
) S: x2+y2-4x+2y+4 = 0, M0(2,-2,0).
- . (x,y,z) . M0(-1,1,-1), ?
- z = x3 + 8y3-6xy +1.
- z = x2 y (4-x-y)
D: y = 6-x, y = 0, x = 0.
22
) z = y- ; ) z = .
- 4/((1,03)2+(2,97)2).
- .
- u = arcsin , x = sin t, y = cos t t = π, .
- z = z(x,y), : x2+y2+z2+2xy-4x-yz-3y-z = 0, M0 (1,-1,1) .
6. , u = .
- S M0 (x0,y0,z0). , ), .
) S: x2+2y2+z2-4xz = 8, M0(0,2,0);
) S: 2x2-y+2z2 = 0, M0(1,10,2).
- : xy = 4 x = y . 0(2,2) z = x3+y3-3xy x?
- z = y -y2-x+6y
- z = x3-y3-3xy
D: x = 0, x = 2, y = -1, y = 2.
23
) z = x; ) z = arcsin (1-x2-y2) + arcsin 2xy.
- artg (0,96/1,05).
- z = arcsin (xy)-3xy2.
- , x = sin 2t, y = tg 2 t t = , .
- z = z(x,y), : x2-y2-z2+2x-4y+6z+12 = 0, M0 (0,1,-1) .
- , u = 3+ ln (x2+(y+1)2) .
- S M0 (x0,y0,z0). , ), .
) S: x2-y2-2z2-2y = 0, M0(-1,-1,1);
) S: x2+y2+2z2 = 10, M0(-1,1,2).
- y2 = 4x x2+y2 = 5 . 0(1,2) z = x3+y3 x?
- z = x2-xy+y2+9x-6y+20.
- z = 4(x-y)-x2-y2
D: 2y + x = 4, x-2y = 4.
24
) z = ln (25-x2-y2); ) z = arctg ().
- (0,99)5,05.
- z = .
- u = , x = ln t, y = t2 t = 1,
- z = z(x,y), : +z3-3z = 3, M0 (4,3,1) .
- , u = .
- S M0 (x0,y0,z0). , ), .
) S: x2+y2-3z2+xy = -2z, M0(1,0,1);
) S: y2-4y+z = 0, M0(1,-2,-12).
- : x2 + y2 = 8 y = -x . M0(-2, 2) z = x.
- z = xy(6-x-y).
- z = x2-y2+2xy-4x
D: y = x+1, y = 0, x = 3.
25
) ; ) z = .
- (e 1,15)1,1.
- z = .
- u = arctg (x+y), x = t2+2, y = 4-t2 t = 1, .
- z = z(x,y), : x2+2y2+3z2 = 59, M0 (2,1,1) .
- , u = e cos (4y+x) .
- S M0 (x0,y0,z0). , ), .
) S: 2x2-y2+z2-6x+2y+6 = 0, M0(1,-1,1);
) S: z = y2-y-2, M0(0, , ).
- u = ln (x2+y2+z2) . (x,y,z) . M0(1,1,1).
- .
- D: y = 0,y = 2, x = 0,x = 1.