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Question

Simplify: a4 × b3 × c5 × d7a7 × b3 × c2 × d9


A

a3b6c3d2

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B

a3b5c3d2

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C

a2b6c3d2

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D

a3b6c3d4

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Solution

The correct option is A

a3b6c3d2


Using the fact that knkm=knm for k0,
a4 × b3 × c5 × d7a7 × b3 × c2 × d9

=a(4+7)×b(3+3)×c(52)×d(7+9)

=a3×b6×c3×d2

=a3b6c3d2


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