Definite IntegrationHard

Question

The value of the definite integral dx is equal to

Options

A.
B.4 √2
C.4 √3 - 4/3
D.

Solution

Let 5(4x - 5) = t2
⇒  20x - 25 = t2   ⇒ x =
Also    20 dx = 2t dt     or    dx = dt
∴ I = dt
=
=

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