Let Substituting 1+x2= t⇒ 2x dx=dtAlso, When x=0, t=1 and x=1, t=2We get (For proof check Q23.) (Since )

Q25 of 394 Page 20

Evaluate

Let

Substituting 1+x²= t

⇒ 2x dx=dt

Also, When x=0, t=1 and x=1, t=2

We get (For proof check Q23.)

(Since )

Evaluate