# KVPY #20

Calculus Level 4

If $I_{n} = \displaystyle\int_{0}^{π/4} \tan^{n} x \ dx$, then $\dfrac{1}{I_{2} + I_{4}}$, $\dfrac{1}{I_{3} + I_{5}}$, $\dfrac{1}{I_{4} + I_{6}}$ follows a/an $\text{\_\_\_\_\_\_\_\_\_\_}$ in that order.



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