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Chapter 7 Integrals Ex 7.6 Solutions

Question - 21 : -

Answer - 21 : - Let

Integrating by parts, weobtain

Again integrating byparts, we obtain


Question - 22 : -

Answer - 22 : - Let 

Integrating by parts, weobtain

Question - 23 : - equals

Answer - 23 : - Let 

Also, let   

Hence, the correct answeris A.

Question - 24 : - equals

Answer - 24 : -

Let 
Also, let  
It is known that, 

Hence, the correct answeris B.

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