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The smallest interval [a,b] such that ...

The smallest interval [a,b] such that
`overset(1)underset(0)int (1)/(sqrt(1+x^(4)))dx in [a,b]`, is

A

`[1//sqrt2, 1]`

B

`[0,1]`

C

`[1//2,1]`

D

`[3//4,1]`

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The correct Answer is:
A
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  13. If I(n)=underset(0)overset(pi//4)inttan^(n)x dx, then (1)/(I(2)+I(4)...

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  14. If I (1) = int (0) ^(1) 2 ^(x ^(2)) dx, I (2) = int (0) ^(1) 2 ^(x ^(3...

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  15. If u (n) = int (0) ^(pi//2) x ^(n) sin x dx, n in N then the value of ...

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  18. The value of the integral l = int(0)^(1) x(1-x)^(n) dx is

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