log2^(X-1) + log2^(x-2) -1 = 0是一元三项的对数函数方程,为了防止看错,我加了空格.

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log2^(X-1) + log2^(x-2) -1 = 0
是一元三项的对数函数方程,为了防止看错,我加了空格.

log2^(X-1) + log2^(x-2) -1 = 0
log2^[(x-1)(x-2)]=1
(x-1)(x-2)=2^1=2
x^2-3x+2=2
x^2-3x=0
(x)(x-3)=0
x=0 x=3