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Given that 2^x  = 7, find the value of (4^x-1)

Note: It is find the value of 4 to the power of x-1. 

 Feb 1, 2021
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4^x is 2^2x which is (2^x)(2^x)

 

this is 7*7 which gives 49

 

since exponent is subtracting one, we divide by four 

 

and get 49/4

 Feb 2, 2021

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