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math problem?
13
∫ 2xdx
10 ? ok what does it mean? it's not my homework (i'm 57 years old) i just want to know,? i forgot most of my calculus from not using it.
it didn't print out the way it looked when i wrote it...
the ten on the bottom and the thirteen on top by the integral sign, then 2xdx...
i thought it was 69 , it was on a college students t-shirt with a ?mark
6 Answers
- 1 decade agoFavorite Answer
another person already solved it but ill explain it :)
you need to take the antiderivative of 2x which in this case is x squared, then solve for x at 13.
you get 169 << (thirteen squared)
then you solve for x at 10.
we get 100 (10 squared)
subtract 100 from 169 and you get 69.
Source(s): this link explains the fundamental theorem of calculus http://en.wikipedia.org/wiki/Fundamental_theorem_o... - HelmutLv 71 decade ago
You got it right in 1!
Integral(2xdx) = x^2 + C
applying the limits:
13^2 - 10^2 = 69
- 1 decade ago
13 and 10 are the upper and lower limits(respectively) of the integral.
solving the integral gives x^2
solving between the limits,
13^2 - 10^2
=169 - 100
=69.
- Anonymous1 decade ago
13
=[2x^2/2]
10
13
=[x^2]
10
=13^2 - 10^2
=(13+10)*(13-10)
=23*3=69 ans
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- SANLv 51 decade ago
No doubt a geek reference to certain sexual activities college students are known to pursue.
