A-level Integration Maths Question Help

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gaminghoodwink
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#1
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#1
Could someone help me with the below question. So far I have found that the integral of x^2lnx is 1/3 . x^3 . lnx - x^3. 1/9
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gaminghoodwink
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mqb2766
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#3
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So sub in the integration limits. Youre told the upper limit. The lower limit is when the integrand is 0, so x=...
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gaminghoodwink
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(Original post by mqb2766)
So sub in the integration limits. Youre told the upper limit. The lower limit is when the integrand is 0, so x=...
isnt it not from 1 as that is when it crosses the x axis
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mqb2766
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(Original post by gaminghoodwink)
isnt it not from 1 as that is when it crosses the x axis
yes the lower limit is 1.
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gaminghoodwink
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(Original post by mqb2766)
yes the lower limit is 1.
so from 1 to e
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gaminghoodwink
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#7
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(Original post by mqb2766)
yes the lower limit is 1.
I got p = 2/9 and q = 1/9
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the bear
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(Original post by gaminghoodwink)
Could someone help me with the below question. So far I have found that the integral of x^2lnx is 1/3 . x^3 . lnx - x^3. 1/9
your integral is fine ( there would be +c but next we need to put in limits so we can leave out the c )

to find the lower limit you want y to equal zero.

any thoughts ?
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mqb2766
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#9
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(Original post by gaminghoodwink)
I got p = 2/9 and q = 1/9
Looks good
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