CBSE Class 12-science Answered

Qn.# 1

so we get,  A(x+5) + B ( 3x-2) = 1

By equating coefficients of x , we get , A+3B = 0  or B = - ( A/3 )

By equating constant term , we get, 5A - 2B = 1  or 5A +(2/3)A = 1  or A = 3/17  and B = -1/17

= (1/17) ln [ (3x-2) / (x+5) ]

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Qn. #2

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Qn. #3

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Qn. #4

Let us use the following integration formula

Hence we get