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

I dont even know where to start :(

 Nov 6, 2021
edited by Guest  Nov 6, 2021
 #1
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4^x-1 = 13

 Nov 6, 2021
 #2
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4^x -1

(22) x - 1

(2x)2 - 1         sub in 2x =7

72 -1 = 48

 Nov 6, 2021

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