Fig 1 shows skectches of the curve

y = 3x^2 + k

The area of A is 3 times the area of B, Find the value of K.

Please help.

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- March 7th 2009, 02:50 AMDobbixFind the value of k, please help.
Fig 1 shows skectches of the curve

y = 3x^2 + k

The area of A is 3 times the area of B, Find the value of K.

Please help. - March 7th 2009, 05:16 AMjimmyk
I think it goes:

Integrate 3x^2+k and you get: x^3 + kx

Now we know A = 3B so using the integral above we get:

A as 8 + 2k, and

B as 1 + k

so 8 + 2k = 3(1 + k)

Which gives k = 5 - March 7th 2009, 06:57 AMDobbix
Thanks.