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Questions  

 The function f(x)=tanx11ex5sgnx1113x2+2, where  [.] denotes greatest integer function, is 

a
even function
b
odd function
c
even as well as odd function
d
neither even nor odd function

detailed solution

Correct option is C

x2≥0⇒3 x2 ≥0 ⇒3 x2+2≥2 ⇒ 13x2+2≤12 ⇒13x2+2∈(0,12]  ⇒ 13x2+2 =0  for all x∈R⇒ fx=0  ⇒f-x=0 ⇒f-x=fx  and f-x =-fx                                             ⇒ fx  is even as well as odd function

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