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Maths a level question

Why does the answer stay as 2.73 for part (ii)
this is the qs
The integral in (ii) looks suspiciously similar to that in the main, right? It's just a bit off with the exponents (by a minus 1, which is good).
Hmm... Is there a way to make the integral look exactly the same as the main (perhaps only off by a scalar, or perhaps not)?

Some integration techniques will be useful here. Try if you get anything interesting.
(edited 1 year ago)

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