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Question: If U<sub>n</sub> = <img src="https://cdn.pureessence.tech/canvas_494.png?top_left_x=934&top_left_y=0...

If Un = then Un + Un–2 =

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Answer
Explanation

Solution

Un =

= (sec2 x –1) dx

– Un–2

Un + Un–2 = = 1n−1\frac { 1 } { \mathrm { n } - 1 }