Qualification > Math
[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !
Arthur Bon Zavi:
--- Quote from: polltery on May 02, 2011, 04:45:20 am ---the marked one is done! but i need help with the second one.. cant really understand how do i integrate it :/
--- End quote ---
No mistake in it. It is TOTALLY correct.
SkyPilotage:
If 2 vectors are parallel and have same magnitude, do they have the same vector eqn?
iluvme:
Yup, and the angle between them will be zero.
Tohru Kyo Sohma:
i have a doubt here.............pls pls pls help me because i have my exam tomorrow......its P11 oct/nov 2009 qns 2!!i found the point on the curve but i cant find the points of the line x+2y= ? ( ? that pi, just incase its not clear)
PLEASE PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!this is very important for me...!!!!
and i have a few more doubts while doing the papers....how do we find whe to put <,> signs in function question...i usually get the value right but the signs are wrong!!!any tips!!
SkyPilotage:
--- Quote from: mimiswift on May 07, 2011, 09:14:32 pm ---i have a doubt here.............pls pls pls help me because i have my exam tomorrow......its P11 oct/nov 2009 qns 2!!i found the point on the curve but i cant find the points of the line x+2y= ? ( ? that pi, just incase its not clear)
PLEASE PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!this is very important for me...!!!!
and i have a few more doubts while doing the papers....how do we find whe to put <,> signs in function question...i usually get the value right but the signs are wrong!!!any tips!!
--- End quote ---
-If you want to plot the point of the line just substitute x with any value from 0 to pi. ex 0.25pi+2y=pi--->0.75pi=2y find y and u have a point....
Do the same for another value of x and u get another point then join them to draw the line...
-Regarding the signs you put them on a number line and put the values on the number...outside the range of values is the same sign as a(coefficiient of x^2)....
for example if you have : x^2-x<0 so u put in the number line x=0 and x=1 soo outside this range is +ve since x^2 is +ve and inside the range is -ve. Since the question asks for <0 (-ve) it is 0<x<1. I hope that helps.
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