log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5)
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log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5)
log2(x – 2 ) + 2 = log2(5)
log2(x – 2 ) + 2 = log2(5)
log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5)
log2(x – 2 ) +log2(4)= log2(5)
4(x-2)=5
x-2=5/4
x=13/4
log2(x – 2 ) + 2 = log2(5)
即log2(x – 2 ) + log2(4) = log2(5)
log2(4*(x – 2 ))= log2(5)
得4x-8=5
x=13/4
log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5)
log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5)
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