Shaded Area

Calculus Level 3

If the area of the shaded region is 1 1009 unit 2 \dfrac1{1009} \text{ unit}^2 for constant n n , find n n .


The answer is 2017.

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2 solutions

Sanath Balaji
Jan 20, 2017

Simple solution to a very difficult-looking problem!

Alex Li - 4 years, 4 months ago
Sahil Silare
Jan 24, 2017

For this I would name two graphs as 1 and 2. So, G r a p h 1 : x = y n Graph_1:x=y^n G r a p h 2 : y = x n Graph_2:y=x^n Area under g r a p h 1 graph_1 will be the area under y a x i s y-axis , A r e a = 0 1 y n d y Area=\int _0^1y^ndy A r e a = 1 n + 1 Area=\frac{1}{n+1} Similarly area under g r a p h 2 graph_2 will be area under x a x i s x-axis , A r e a = 0 1 x n d x Area=\int _0^1x^ndx A r e a = 1 n + 1 Area=\frac{1}{n+1} By adding up areas we get, A r e a = 2 ( n + 1 ) Area=\frac{2}{\left(n+1\right)} 1 1009 = 2 ( n + 1 ) \frac{1}{1009}=\frac{2}{\left(n+1\right)} n = 2017 n=2017 I didn't knew this problem was linked with new year BTW Happy New Year 2017!

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