Answer help: i need help, - Help.com

i need help,

with a math problem

i think the answer is 2 but im not sure

integrate from 0 to 8 dx/(sqrt(1+x))
thanks

This open post was written 1 year, 10 months ago | V/U/S: 126, 1, 2 | Edit Post | Leave a reply | Report Post


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Creal Default offline Verified User (3 years) Long Term User Shouts: 2 #
Houston, TX, US | 1 year, 10 months ago (6 hours, 2 minutes after post)

According to this site: http://wims.unice.fr/wims/wims.cgi?module=tool/analysis/function.en, the answer is 4.

When you take the antiderivative of (1+x)^(-1/2), you get 2*(1+x)^(1/2).
If you plug in 8, you get:
2*(1+8)^(1/2)
2*9^(1/2)
2*3
6
If you plug in 0, you get:
2*(1+0)^(1/2)
2*1
2
So if you’ll find the answer is 6-2 = 4.

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