QUOTE(bryanyeo @ Nov 26 2010, 08:43 PM)
i got 3.464
yup correct can u show the working? =D thx!-SPM Thread Version Four-, Its never too late! :)
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 Nov 26 2010, 09:30 PM
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#41
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Nov 26 2010, 09:34 PM
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#42
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QUOTE(Inspiralution @ Nov 26 2010, 09:29 PM) i heard my cousin's sister's bf's grandfather's grandson's stepfather's wife's sister's friends say need resit bm wor...how? what is the answer?is it 3/2? LOL btw,what is the method used to solve this? Give that the points A(1,-4),B(2h+1,2) and C(5,4) are collinear,find the value of h. can we use the method which we used to find the area of triangle?or how? thanks  |
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Nov 26 2010, 09:43 PM
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#43
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QUOTE(Inspiralution @ Nov 26 2010, 09:35 PM) ya. you can actually use gradient method to find the answer..the three points have the same gradient because they r in one line..=) |
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Nov 26 2010, 10:06 PM
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#44
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can someone help me with this?MRSM questions r killing me.
15)3.464 22a)48 b)6 This post has been edited by 556611: Nov 26 2010, 10:09 PM |
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Nov 26 2010, 10:20 PM
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#45
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QUOTE(1malaysia @ Nov 26 2010, 10:10 PM) a) 48 thanks but the question is abit confusing for me..b) 6 a) 6X8 b) 48 - 9 - trapezium is 9=area from the curve to the y-axis? i thought it is from the straight line to the y-axis  Added on November 26, 2010, 10:23 pmP A R L I M E N T A four-letter password is to be formed using four of these letters. Find the number of different four-letter passwords that has at least one vowel. [ans:2664] p/s:anyone knows how to do? This post has been edited by 556611: Nov 26 2010, 10:23 PM |
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Nov 27 2010, 01:22 AM
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#46
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f(x)=x-2
hf(x)=x^2+3x+1 find h(x) what is the answer? the skema gave x^2+3x+3 |
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Nov 27 2010, 02:04 AM
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#47
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QUOTE(yoyoman @ Nov 27 2010, 01:30 AM) like this mate why i keep counting like this ..can u tell me where is my stupid mistake?lolhf(x)=x^2+3x+1 h is x actually become h(x)-2=x^2+3x+1 h(x)=x^2+3x+3 Wallah easy  Attached thumbnail(s) 
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Nov 27 2010, 10:45 AM
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#48
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QUOTE(IcyDarling @ Nov 27 2010, 04:17 AM) but h is outside... so h is the function and f(x) is the the variable right? lol i did that question for like 6 times and i can't find my error.i got the exact same way. where did u get the question from ? This question is from Perak trial..=) But I feel that the skema has a few mistakes... Added on November 27, 2010, 10:59 am QUOTE(xiu lyn @ Nov 27 2010, 09:14 AM) help me this.. Find the range of values of x that satisfy both inequalities 2x^2-4x-3 ≥ x and -2<x-1<4. i got a weird answer too-1<x≤-1/2 3≤x<5 This post has been edited by 556611: Nov 27 2010, 10:59 AM |
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Nov 27 2010, 12:03 PM
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#49
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how to do this?
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Nov 27 2010, 12:15 PM
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#50
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QUOTE(1malaysia @ Nov 27 2010, 12:07 PM) triangle - sector of circle how to find the angle of R?= 32 - 25.136 = 6.864 i don't get it..can u explain how to find the area of triangle and circle?thanks =D |
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Nov 27 2010, 12:17 PM
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#51
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QUOTE(bryanyeo @ Nov 27 2010, 12:13 PM) 1/2 pi is 90 degree. Owhhh okay thanks man =DPQ=QR, so angle QPR = 45 degree which is 1/4 pi. area of sector is 1/2 x 8^2 x 1/4 x 3.142 Added on November 27, 2010, 12:14 pm my solution: 2x^2 - 4x - 3 ≥ x 2x^2 - 5x -3 ≥ 0 (2x+1)(x-3)≥0 draw the inequality graph x≤-1/2 , x≥3 x>-1 , x<5 therefore, -1<x≤-1/2 3≤x<5 |
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Nov 27 2010, 12:35 PM
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#52
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QUOTE(abang brother @ Nov 27 2010, 12:32 PM) Guys for trigo, can you list out the pi value for 45,135,215 etc? I usually spend a lot of time figuring it out. Thanls you mean when sketching the graph?________________________________ If something is floating stationary on water,what does this imply? the buoyancy force=weight of object? |
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Nov 27 2010, 12:59 PM
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#53
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What bout this question?
answer given is C. weird.why isn't it E. Attached thumbnail(s) 
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Nov 27 2010, 01:47 PM
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#54
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QUOTE(abang brother @ Nov 27 2010, 01:44 PM) Ah i was caught by the log0.25. Have to be extra careful lol i was even stupid i did 1/4^n-1 > 4^-6 and i got n>7 . sigh. should only do the log method rite? |
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Nov 27 2010, 02:31 PM
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#55
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QUOTE(1malaysia @ Nov 27 2010, 02:05 PM) (1/4)^n-1 > 4^-6 oops i know where i did wrong...thank you! 4^(-n+1) > 4^-6 -n + 1 > -6 -n > -7 n < 7 n = 6  |
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Nov 27 2010, 02:41 PM
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#56
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QUOTE(Sean93 @ Nov 27 2010, 02:32 PM) what if i do it this way? i think we supposed to inverse it first to (1/4)^n-1 > (1/4)^6 n-1 > 6 n > 7 Thats why i'm confused 4^-n+1>4^-6 |
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Nov 27 2010, 03:19 PM
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#57
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QUOTE(akaneikegami @ Nov 27 2010, 03:15 PM) I thought we can write materials and apparatus together? usually me too,i'll write apparatus and materials together...by the way, why the heating element of a kettle needs high resistivity? |
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Nov 27 2010, 04:31 PM
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#58
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Any idea on this"?
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Nov 27 2010, 04:51 PM
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#59
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QUOTE(:+:DarreN:+: @ Nov 27 2010, 04:34 PM) when it's parallel to the x-axis, the gradient is 0. Owh issit !!  I thought it is 1! lol !anyway,thanks  |
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Nov 27 2010, 05:21 PM
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#60
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Answer given is C.
I got B. so who's correct?  Attached thumbnail(s) 
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