lim(x→0)(x^x)等于多少
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lim(x→0)(x^x)等于多少
![lim(x→0)(x^x)等于多少](/uploads/image/z/19636846-70-6.jpg?t=lim%28x%E2%86%920%29%28x%5Ex%29%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
只能是x→0+,极限是1
lim(x→0+)(x^x)
=lim(x→0+) e^ln(x^x)
=lim(x→0+) e^(xlnx)
=e^lim(x→0+) (xlnx)
=e^0
=1
再问: 为什么lim(x→0 ) (xlnx)趋近于0
再答: lim(x→0+ ) (xlnx) =lim(x→0+ ) lnx/(1/x) (∞/∞) =lim(x→0+ ) (1/x)/(-1/x^2) =lim(x→0+ ) (-x) =0
lim(x→0+)(x^x)
=lim(x→0+) e^ln(x^x)
=lim(x→0+) e^(xlnx)
=e^lim(x→0+) (xlnx)
=e^0
=1
再问: 为什么lim(x→0 ) (xlnx)趋近于0
再答: lim(x→0+ ) (xlnx) =lim(x→0+ ) lnx/(1/x) (∞/∞) =lim(x→0+ ) (1/x)/(-1/x^2) =lim(x→0+ ) (-x) =0
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