Answer:
Explanation:
2^[x+1]-2^[x-1]
=2^x×2-[2^x]÷2
=2[2^x]-1/2[2^x]
so 2^[x+1]-2^[x-1]= 15 can be written as 2[2^x]-1/2[2^x]= 15 !
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