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.
2006-09-17 20:47:11 · 6 answers · asked by duhman 3 in Science & Mathematics ➔ Mathematics
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...
2006-09-17 20:50:11 · update #1
i thought it was 69 , it was on a college students t-shirt with a ?mark
2006-09-17 20:55:39 · update #2
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.
2006-09-17 20:58:56 · answer #1 · answered by ThE_HooLiGaN 3 · 0⤊ 0⤋
You got it right in 1!
Integral(2xdx) = x^2 + C
applying the limits:
13^2 - 10^2 = 69
2006-09-18 04:02:53 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
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.
2006-09-18 10:59:04 · answer #3 · answered by noesis 2 · 0⤊ 0⤋
13
=[2x^2/2]
10
13
=[x^2]
10
=13^2 - 10^2
=(13+10)*(13-10)
=23*3=69 ans
2006-09-18 07:54:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
13
=2*x^2/2]
10
13
=x^2]
10
=13^2 - 10^2
=169-100
69
2006-09-18 03:51:45 · answer #5 · answered by wildeve h 1 · 0⤊ 0⤋
No doubt a geek reference to certain sexual activities college students are known to pursue.
2006-09-18 05:34:43 · answer #6 · answered by SAN 5 · 0⤊ 0⤋