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- Feb 7th 2007, 07:25 AM #1

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## cal 2

evaluate the definite intergral with limits squar root of pi and 0 xsin(x^2)dx. give answer in decimal number with four places.

"" limits 5 and 1 1/square root 2x-1 dx give answer in decimal number with four places.

"" limits 2 and 0 x/square root 1+2x^2 dx.""

- Feb 7th 2007, 10:39 AM #2

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- Feb 7th 2007, 02:49 PM #3

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Hello, lay137!

Exactly where is your difficulty?

These are all straight Substitution problems . . .

[int] x·sin(x²) dx . . . from 0 to √2

[int] dx / √(2x - 1) . . . from 1 to 5

Let: u = 2x - 1

[int] x dx / √(1 + 2x²) . . . from 0 to 2

Let: u = 1 + 2x²