A Math
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Question2:
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I HATE SETS!
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*dies*
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ans is (9p/4)%
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if u hv the answer pls post them at the very start next timeOriginally posted by Y_Shun:ans is (9p/4)%
thanks -
ya i know, paiseh, forgot abt itOriginally posted by eagle:if u hv the answer pls post them at the very start next time
thanks
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you cannot divide by p% because the p% is calculated over rOriginally posted by Y_Shun:Question2:
for percentage change in V, the percentage is calculated over V
Instead, you should do the following:
There's a more elegant way. I see if I remember then I post it out -
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I mus hav been damn tired.I see tio stun cannot think alrdy
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2nd Method for Question 2
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Question 3:
P reduce to
x > 2
Q:
2x²-3x-9 < 0
(2x+3)(x-3) < 0
Hence, -1.5 < x < 3
Q':
-4 < x < -1.5, 3 <= x <= 4
Draw on number line to see the intersection
Answer should be 3 <= x <= 4 -
is ans for qn 3Originally posted by Y_Shun:
3 < x <= 4
Made a careless mistake just now -
answer bingo~Originally posted by eagle:Question 3:
P reduce to
x > 2
Q:
2x²-3x-9 < 0
(2x+3)(x-3) < 0
Hence, -1.5 < x < 3
Q':
-4 < x < -1.5, 3 <= x <= 4
Draw on number line to see the intersection
Answer should be 3 <= x <= 4
i reduced to the same... i guess my number line suck...thats why cannot see the ans
ty ty alot! -
actually if you can visualise, no need number line also canOriginally posted by Y_Shun:answer bingo~
i reduced to the same... i guess my number line suck...thats why cannot see the ans ty ty alot!
number line is for the tired marker to see it more clearly -
All of you can go be Sec Sch or JC teachers.
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I do teach maths tuition for sec sch to JC a few years ago
Now lost 50% of power liao, so never go teach le