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Calculus1 20 Online
OpenStudy (anonymous):

find the area of the region between y=x^2 and y=x^3 for 0 less than equal to x less than equal to 1.

OpenStudy (anonymous):

in that interval which would be the top and which would be bottom curve?

OpenStudy (anonymous):

x^2 is on top

OpenStudy (anonymous):

so do you remember how to use the integral to find area?

OpenStudy (anonymous):

i think so

OpenStudy (anonymous):

ok so what is it?

OpenStudy (anonymous):

i would have (x^2-x^3)dx

OpenStudy (anonymous):

exactly but what are the limits of integration?

OpenStudy (anonymous):

and use the power rule of integration?

OpenStudy (anonymous):

1 and 0 i believe

OpenStudy (anonymous):

right, integral from 0 to one of (x^2 - x^3) dx

OpenStudy (anonymous):

and use power rule like u said, and evaluate at those limits

OpenStudy (anonymous):

do you know how to evaluate a definite integral?

OpenStudy (anonymous):

and that becomes.. x^3/3-x^4/4

OpenStudy (anonymous):

correct

OpenStudy (anonymous):

and you plug in 1 and solve then 0 and solve

OpenStudy (anonymous):

correct

OpenStudy (anonymous):

but you subtract the x=0 evaluation form the x = 1 evaluation

OpenStudy (anonymous):

1^3/3-1^4/4

OpenStudy (anonymous):

but the x=0 evaluation is just 0 so you dont need to worry about it in this case

OpenStudy (anonymous):

and you subtract 0^3/3-0^4/4 from that?

OpenStudy (anonymous):

yea so it is then just 1/3-1/4

OpenStudy (anonymous):

correct sir

OpenStudy (anonymous):

which gives you 1/12?

OpenStudy (anonymous):

correct

OpenStudy (anonymous):

ok but in the back of my textbook its telling me it is .083

OpenStudy (anonymous):

that why im confused

OpenStudy (anonymous):

1/12 is approximately, .083

OpenStudy (anonymous):

on a calculator put in 1/12

OpenStudy (anonymous):

wow...

OpenStudy (anonymous):

duhh lol

OpenStudy (anonymous):

hehe

OpenStudy (anonymous):

thank you very much

OpenStudy (anonymous):

yw

OpenStudy (anonymous):

u did all the work :)

OpenStudy (anonymous):

well im glad i got to double check! lol

OpenStudy (anonymous):

haha yeah

OpenStudy (anonymous):

thanks again

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