If 2^n-1+2^n+1=320 ,then n is equal to...
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2 ^n)(2^-1 +2^+1 )= 320
2^n ( 1/2 + 2) = 320
2 ^n( 5/2) = 320
2^n = 320*2/5
2^n=64*2
2^n=128
2^n=2^7
n = 7
2^n ( 1/2 + 2) = 320
2 ^n( 5/2) = 320
2^n = 320*2/5
2^n=64*2
2^n=128
2^n=2^7
n = 7
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