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1 30.08.2011
, 2011
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1. .
f(x) | f(x) | f(x) | |||
2. .
f(x) | f(x) | f(x) | |||
y 2 - 2 x 2 - 4 | y 2 +24 x 2 - 4 | 2 y 2 - 9 x 2 18 | |||
4 y 2 - 5 x 2 20 | |||||
4 y 2 + 5 x 2 - 20 | 2 y2 +9 x 2 18 |
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1. .
2. .
3. .
24- | |||||
MATHCAD.
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1. Y .
1 | 2 | 3 | 4 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
3.456 | 0.642 | 7.12 | 8.64 | 1.25 | 66.4 | 3.845 | 4.632 | 0.562 | 0.2575 | 0.1756 | 0.2131 | ||
5 | 6 | 7 | 8 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
23.16 | 17.41 | 32.37 | 16.342 | 12.751 | 10.82 | 9.37 | 1.4 | 2.0435 | 1.1752 | 4.5681 | |||
9 | 10 | 11 | 12 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
3.456 | 1.245 | 0.327 | 0.143 | 0.242 | 3.258 | 0.3575 | 0.1756 | 0.2131 | 0.7568 | 0.8345 | 0.6384 | ||
13 | 14 | 15 | 16 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
5.3 | 6.2 | 12.5 | 19.5 | 12.8 | 11.3 | 14.8 | 8.52 | 1.67 | |||||
17 | 18 | 19 | 20 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
2.48 | 3.05 | 1.73 | 2.878 | 1.169 | 0.299 | 2.76 | 3.25 | 17.67 | 0.652 | 0.131 | 0.144 | ||
21 | 22 | 23 | 24 | ||||||||||
a | b | c | a | b | c | a | b | c | a | b | c | ||
5.03 | 3.28 | 2.5 | 3.7 | 7.3 | 2.786 | 3.108 | 4.2 | 3.8 | |||||
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2.. .
a¢(x) | b¢¢(x) | |||
1,11 | ||||
2,12 | ||||
3,13 | ||||
4,14 | ||||
5,15 | ||||
6,16 | ||||
7,17 | ||||
8,18 | ||||
9,19 | ||||
10,20 | 5x |
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5. 4 [2]. . 5.
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6. lsolve :
x 1+2 x 2+5 x 3=-9,
x 1 x 2+3 x 3=2,
3x 16 x 2 x 3=25.
lsolve . 6. . 7 .
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7. y = x \(x 29). . 8 , 3 3.
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8. : 5 x 2+3 y 215=0.
: x 2/3+ y 2/5=1. . . , . . . 3.71.
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9. 2 x 48 x 3+8 x2 1=0.
polyroots(v), ( , ) n , v, n +1.
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15. f (x)=0.
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16. : { x 2+ y 2+3 x 2 y =4, x +2 y =5}.
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[1] . ∆= det A n n A∙x=b , x1, x2,..., xn, xi=∆i/∆, ∆i , i b.
[2] : n n A∙x=b, , , x=A-1∙b.
[3] , x . , .
[4] root .3.78. MathCAD : . , . , .