1.

Let I_(n)=int tan^(n)x dx, (n gt 1). If I_(4 ) +I_(6)=a tan^(5)x+bx^(5)+C, where C is a constant of integration, then the ordered pair (a, b) is equal to :

Answer»

A) `(-(1)/(5), 1)`
B) `((1)/(5),0)`
C) `((1)/(5), -1)`
D) `(-(1)/(5),0)`

Answer :2


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