lnx+x-1≤0
loge(x)+loge(e^x)-loge(e)≤0
loge[x×e^(x-1)]≤loge(1)
e為2.7.,函數(shù)在定義域上為增函數(shù)
1≥x×e^(x-1)
當(dāng)x=1時(shí),x×e^(x-1)=1
x1
真數(shù)x>0,e^x恒大于0
綜上,0
lnX + X - 1 小于等于0 求X
lnX + X - 1 小于等于0 求X
數(shù)學(xué)人氣:259 ℃時(shí)間:2020-04-18 21:58:57
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