If f(x)=|x+2|tan −1(x+2), x≠−22, x=-2then f(x) is
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a
Continuous at x=−2
b
not continuous at x=−2
c
Differentiable at x=−2
d
continuous but not differentiable at x=−2
answer is B.
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Detailed Solution
limx→−2−f(x)=limx→−2−x+2tan−1x+2=limx→−2−−x+2tan−1x+2=−1 ∵limx→0−tan−1xx=1limx→−2+f(x)=limx→−2+x+2tan−1x+2=limx→−2+x+2tan−1x+2=1∴limx→−2f(x) does not exist.