作业帮log2(x^2-2x=29)>=5 算x的值log2(x^2-2x-29)>=5 中间是减号，打错啦
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log2(x^2-2x=29)>=5 算x的值log2(x^2-2x-29)>=5 中间是减号，打错啦
log2(x^2-2x=29)>=5 算x的值
log2(x^2-2x-29)>=5 中间是减号，打错啦
log2(x^2-2x=29)>=5 算x的值log2(x^2-2x-29)>=5 中间是减号，打错啦
∵ x^2-2x-29>0√
log2(x^2-2x-29)≥5=log2[2^5)
即 x^2-2x-29≤ 32
∴x1+√30,1-√62≤ x≤1+√62
∴log2(x^2-2x-29)≥5的解集为：
{x:1-√62≤ x
log[2](x^2-2x-29)>=5
∵2>0
∴log[2](x^2-2x-29)单调递增
x^2-2x-29≥2^5
x^2-2x-61≥0
x≤1-√62,或x≥1+√62
∵ x^2-2x-29>0
log2(x^2-2x-29)≥5=log2[2^5)
即 x^2-2x-29≥ 32
∴x^2-2x-61≥0
∴(x-1)^2≥62
∴x≤1-√62,或x≥1+√62
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log2(x^2-2x=29)>=5 算x的值log2(x^2-2x-29)>=5 中间是减号，打错啦
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