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Mathematics 7 Online
OpenStudy (anonymous):

Find area of integrand

OpenStudy (anonymous):

OpenStudy (anonymous):

I graphed the integrand first and saw that it is a line, so it forms a triangel

OpenStudy (anonymous):

but the answer is 21 square units, but i keep getting 12

OpenStudy (anonymous):

i used the formula 1/2*b*h

OpenStudy (anonymous):

21

OpenStudy (anonymous):

yeah but how did you get that

OpenStudy (anonymous):

Nah you have to integrate it

OpenStudy (anonymous):

how

OpenStudy (anonymous):

{(x^2)/4 +3x} and the limits are 4 and -2

OpenStudy (anonymous):

Do you know how to integrate?

OpenStudy (anonymous):

yeah, kinda off

OpenStudy (anonymous):

so when i integrate it, how do i evluate it so that i get 21 square units

OpenStudy (anonymous):

Then just integrate it and plug in the values

OpenStudy (anonymous):

(4^2/4+3*4)-((-2)^2/4+3(-2))

OpenStudy (anonymous):

but the problem asks me to use areas to evluate the intergals

OpenStudy (anonymous):

The problem asks you to find the area of integrand, so it should be good enough

OpenStudy (anonymous):

yeah but it says to use areas to find the integrand

OpenStudy (anonymous):

it says" use areas to evluate the integral"

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