Question

`int_4^9 1/sqrt(x)dx` = ______.

विकल्प

• 4

• 2

• 3

• 1

Answer 1

`int_4^9 1/sqrt(x)dx` = 2.

Explanation:

`int_4^9 1/sqrt(x)dx = int_4^9 x^((-1)/2)dx`

= `[x^(1/2)/(1/2)]_4^9`

= `2/1[sqrt(9) - sqrt(4)]`

= 2(3 – 2)

= 2