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0.5=2^x

find x

2007-12-22 10:43:54 · 6 answers · asked by Ade 1 in Science & Mathematics Mathematics

6 answers

2^x = 5/10
2^x = 1/2
2^x = 2^-1
hence x = -1

2007-12-22 10:50:05 · answer #1 · answered by jags20_us 2 · 0 0

2^x = 0.5 = 2^(--1) => x = -- 1

2007-12-22 18:51:21 · answer #2 · answered by sv 7 · 0 0

0.5 = 2^x

It could be that x = -1 because that's the only way the exponent can cause the 2 to become smaller

2007-12-23 13:01:24 · answer #3 · answered by Chau D 2 · 0 0

0.5 = 1/2 = 2^-1.
So your equation is 2^x = 2^-1,
x ln 2 = -1 ln 2
x = -1.

2007-12-22 19:09:29 · answer #4 · answered by steiner1745 7 · 0 0

there are any ways you can choose to solve this problem, but lets take the simplest way.
0.5=2^x
1/2=2^x
2^-1=2^x
thus, x=-1

2007-12-22 18:54:07 · answer #5 · answered by Harris 6 · 0 0

0.5 = 2^x
log0.5 = x*(log2)
x=log(2)/log(.5)
x=0.30103/(-0.30103)
x= -1

2007-12-22 19:05:11 · answer #6 · answered by WhatWasThatNameAgain? 5 · 0 0

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