y = f (x) 0 D f (x 0) D x D x 0, y = f (x) x 0 f ¢(x 0) y ¢(x 0), ..
.
. .
.
U (x) V (x) , C const, :
1. (U V)¢ = U ¢ V ¢;
2. (U V)¢ = U ¢ V + U V ¢;
3. (C U)¢ = CU ¢;
4. ;
5. [ U (V (x))]¢ = ;
6. (U V)¢ = V UV -1 U ¢+ U V ln U V ¢.
:
y = c, c = const | y ¢ = 0 | y = tg x | y ¢ = |
y = xl, l Î R | y ¢ = l xl -1 | y = ctg x | y ¢ = |
y = | y ¢ = | y = arcsin x | y ¢ = |
y = | y ¢ = - | y = arccos x | y ¢ = - |
y = | y ¢ = | y = arctg x | y ¢ = |
y = ex | y ¢ = ex | y = arcctg x | y ¢ = - |
y = ax | y ¢ = ax × ln a | ||
y = ln x | y ¢ = | ||
y = log ax | y ¢ = | ||
y = sin x | y ¢ = cos x | ||
y = cos x | y ¢ = -sin x |
1. , , , .
2. 5 . , , U (x).
,
(Ul)¢ = l U l ‑1 U ¢.
y = U (V ( (x))),
.
3. 1 2 .
,
(U V )¢ = U ¢ V ¢ ¢;
(U V )¢ = U ¢ V + U V ¢ + U V ¢.
y = ln5sin(6 x + 3);
,
y = U 5; U = lnV; V = sin j; j = 6 x + 3,
..
, .
4.
) y = ln(cos4 x); ) y = ;
) y = arctg e3 x ; ) y = ;
) y = ; ) y = ;
) y = (arcsin x) (x 2 + 4)3; ) y = ;
) y = ) y = ;
) y = x 2 tg(3 x + 1); ) y = ;
) y = ; ) y = ;
) y = ) y = sin2 x (3 x + 1);
) y = ; ) y = ;
) y = x sin x + x cos x; ) y = .
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5. z=f(x,y).
dz (,) z=f(x,y) Dx Dy , . .
dz=z'xdx+z'ydy,
- z x y; dx dy - .
(. . 2).
.
.
z=f(x,y)=5x2y3-3y2+6x3y-x4
1. z'x z'y
;
.
2. .
5.
f(x,y)=xy3-2x3y+2y4
f(x,y)=3x+2y2-5x2y2
f(x,y)=x4-6xy2-7y3
f(x,y)=2x2y-8xy2+x3=y3
f(x,y)=x3+5xy3-3x3y
f(x,y)=3x2y2+4xy3-7x3y
f(x,y)=4x5-3x2y3-6y5
f(x,y)=2xy3-4x3y-y4
f(x,y)=x3y-3xy3+y5
f(x,y)=7x-3y+5x3y2
6. .