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Question

Simplify and write (-2)10×(-2)3×(-2)5(-2)7 as a single exponent.


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Solution

We know that for any non-zero integers 'a' and natural numbers m and n, we have :

am×an=am+n

aman=am-n

So, (-2)10×(-2)3×(-2)5(-2)7=(-2)10+3+5(-2)7=(-2)18(-2)7=(-2)18-7=(-2)11

Hence, (-2)10×(-2)3×(-2)5(-2)7 can be written as (-2)11.


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