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Q.

If 4ex+6ex9ex4exdx=Ax+Blog(9ex4ex)+C  then

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a

A=3536,B=1936,C=0

b

A=1936,B=3536,CR

c

A=1936,B=3536,C=0

d

A=3536,B=1936,CR

answer is C.

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Detailed Solution

4ex+6ex9ex4exdx=Ax+B.log(9ex4ex)+c

4ex+6ex=A(9ex4ex)+Bddx(9ex4ex)

=A(9ex4ex)+B(9ex+4ex)

4=9A+9B,6=4A+4B

A+B=49A+B=322B=49+32=8+2718

B=3536

A=493536=163536=1936

CR

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