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junior college 1 | H2 Maths
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trish
Trish

junior college 1 chevron_right H2 Maths chevron_right Singapore

hi i need help with part (iii), thank you!

Date Posted: 2 years ago
Views: 480

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Boy Mow Chau
Boy Mow Chau's answer
317 answers (Tutor Details)
1st
there is a printing mistake in the question. from the sketch, the region between curve c and the line is in the 3rd quadrant, where y>0 instead of y<0.
(the actual question in the original exam paper only gives x<0, no mention of y)

for any volume formed that involves a straight line, can just calculate as volume of cone or cylinder, instead of integrating.

when the question ask for exact area, can & should still use GC to verify the final answer.
Boy Mow Chau
Boy Mow Chau
2 years ago
(sorry, typos in above comments)

... the region between the curve and the line is in the *2nd* quadrant ...

... when the question ask for exact area *or exact volume*, can & should still use GC to verify the final answer ....
trish
Trish
2 years ago
thank you so much!!