Please do part(ii).My answer is 5.61% but the paper's answer is 5.31%.

Please check for me thanks...

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- Oct 11th 2008, 06:32 AMmaybeline9216Area bounded by curves
Please do part(ii).My answer is 5.61% but the paper's answer is 5.31%.

Please check for me thanks... - Oct 11th 2008, 07:02 AMskeeter
I get 5.31%

- Oct 11th 2008, 07:06 AMmaybeline9216
Can tell me how u get? Like: what is your value for the shaded and unshaded area respectively, area of region OAPB, coords.of B AND Coords.of Q

I want to see where my workings and answer differ... - Oct 11th 2008, 07:40 AMskeeter
show me what you did ... maybe i can see your mistake.

- Oct 11th 2008, 07:51 AMmaybeline9216
- Oct 11th 2008, 01:27 PMskeeter
let $\displaystyle f(x) = e^x$

$\displaystyle g(x) = 4 - e^x$

$\displaystyle h(x) = 2(x - \ln{2}) + 2$

$\displaystyle A = \int_0^{\ln{2}} f(x) \, dx + \int_{\ln{2}}^{\ln{4}} g(x) \, dx$

$\displaystyle B = \int_0^{\ln{2}} f(x) - h(x) \, dx$

calculate $\displaystyle \frac{B}{A}$. - Oct 11th 2008, 07:51 PMmaybeline9216
Thanks i found my mistake already..i forgot to add the unshaded area into the calculation of the area of the whole plot