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lim⁡x→0xx\lim_{x \to 0} x^{x}x→0lim​xx​ is equal to:
Question

limx0xx\lim_{x \to 0} x^{x}​ is equal to:

A.

​​​​​00​​

B.

​​​​​11​​

C.

​​​​​1-1​​

D.

​​​​​​​​​​​​​​​​​22​​

Correct option is B

Given:
limx0+xx\lim_{x \to 0^{+}} x^{x}​​
Formula used:
xx=exlnxx^{x} = e^{x \ln x}​​
and
limx0+xlnx=0\lim_{x \to 0^{+}} x \ln x = 0​​
Solution:
Let y=xx y = x^{x}​​
Taking logarithm:
lny=xlnx\ln y = x \ln x​​
Now take limit as x0+:x \to 0^{+}:​​
limx0+xlnx=0\lim_{x \to 0^{+}} x \ln x = 0​​
So,
lny=0y=e0=1\ln y = 0\\y = e^{0} = 1​​
Hence,
limx0xx=1\lim_{x \to 0} x^{x} = 1​​
The correct answer is (b) 1.

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