AP EAMCET Engineering 25 Apr 2017 Shift 1 Paper

Section: Mathematics

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Question : 65 of 160

Marks: +1, -0

If f(x)=Tan−1[

√1+x2+√1−x2

√1+x2−√1−x2

] for 0<|x|<1 then f′(x)=

x
√1−x2
−x
√1−x2
x
√1−x4
−x
√1−x4

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