1.

`int_-1^1 (17x^5-x^4+29x^3-31x+1)/(x^2+1)dx` is equal to (A) `4/5` (B) `5/4` (C) `4/3` (D) `3/4`A. `4/5`B. `5/4`C. `4/3`D. `3/4`

Answer» Correct Answer - C
Let `l=int_(-1)^(1)(17x^(5)+29x^(3)-31x)/(x^(2)+1)dx-int_(-1)^(1)(x^(4)-1)/(x^(2)+1)dx`
`=0-2int_(0)^(1)((x^(2)-1)(x^(2)+1))/((x^(2)+1))dx`
`=-2[((x^(3))/(3)-x)]_(0)^(1)=(4)/(3)`


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