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If the integral l(n)=int(0)^(pi//4)tan^(...

If the integral `l_(n)=int_(0)^(pi//4)tan^(n)xdx` is reduced to its lower integrals like `l_(n-1),l_(n-2)` etc.,
The value of `(l_(3)+2l_(5))/(l_(1))` is

A

1

B

2

C

`pi//4`

D

`pi`

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