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7^-x = 7^-5 then the value of x is  A) 7  B) – 5 

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7-x = 7-5 then the value of x is 

A) 7 

B) – 5 

C) – 7 

D) 5

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1 Answer

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Best answer

Correct option is D) 5

7-x = 7-5 ⇒ -x = -5 ⇒ x = 5

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