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secondary 4 | A Maths
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Kim Kimberly
Kim Kimberly

secondary 4 chevron_right A Maths

Qn11(b) and (c)

Date Posted: 2 years ago
Views: 118

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Sao Chuan
Sao Chuan's answer
22 answers (A Helpful Person)
1st
Hi, I'm not sure if I made an careless mistakes but the general approach to solve this question is written here. Hope it helps.
Kim Kimberly
Kim Kimberly
2 years ago
The answer for (b) is 23x+8y-20=0 and the answer for (c) is 1.95units square though...
Sao Chuan
Sao Chuan
2 years ago
Part (b) answer is correct, just need to multiply by 8 throughout to get that answer.
As for part (c) perhaps I made some mistake in the calculation but the basic idea is finding the area under the curve by integration (from x=0 to x=3), then subtracting the area of the triangle under the straight line.
Sao Chuan
Sao Chuan
2 years ago
Hi, change the "3(ln10)" to "3(ln4)" and you should get the answer. Careless mistake, sorry!