Hi all, I kind of need help with this one. Been trying for a while now but with no luck. So please help!?
Use the Fundamental Theorem of Calculus to find ∫_0^1(x^2- 2e^x)dx
(with the lower unit being 0 and the upper unit being 1)
thanks a lot.
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Verified answer
The integral of the function is [(x^3)/3 -2e^x]
just insert the limits to get the definite integral:
[1/3 - 2e] - [0 -2] = 1/3 -2e + 2 = 2.3333 -2e
which I'll leave you to simplify any further as you wish.
Note that "Stumped" is wrong in adding an integration constant (c) to a definite integral. The integration constant cancels when you insert the limits and subtract.
Spilt up the integral to x^2 and 2e^x. taking the integral of x^2 gives you x^3/3 and the integral of 2e^x is 2e^x. combining them your governing equations is {(x^3/3) - (2e^x)}. Now run this thru the fun. Theo. of Calc. F(b)-F(a) where b=1 and a=0.
{[1^3/3 - 2e^1] - [0^3/3 - 2e^0]} doing the algebra gives you:
(1/3 - 2e^1) - (0/3 - 2e^0)
1/3 - 2e - 0/3 + 2 (remember that anything raised to the zero power is equal to 1)
giving you 7/3 - 2e + c.
The integral from low limit 0 to 1 of [x² - 2e^x] dx =
[(x^3)/3 - 2e^x] evaluated at 1, then subtract [(x^3)/3 - 2e^x] evaluated at zero.
I get 2&(1/3) - 2e.