Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
as level p1 👍👍👍 find volume of graph?
1 Answer
- ?Lv 71 year agoFavorite Answer
1. y = x + 4/x
y' = 1 - 4/x^2 = 0
x^2 - 4 = 0
(x + 2)(x - 2) = 0
x = 2 is min ... (x = -2 would be a max .. is not shown on the graph)
5 = x + 4/x
5x = x^2 + 4
x^2 - 5x + 4 = 0
(x - 1)(x - 4) = 0
a= 1 and b = 4 ... m = 2
2. V = integral [1 to 4] pi x^2(5 -(x + 4/x)) dx
= pi integral [1 to 4] [5x^2 - x^3 - 4x] dx
= pi [(5/3)x^3 - (1/4)x^4 - 2x^2] [1 to 4]
= pi [ (320/3 - 64 - 32) - ( (5/3) - (1/4) - 2) )]
= 45pi/4 <<< answer
