Qualification > Math
[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !
........:
--- Quote from: physichemaths on May 18, 2011, 02:17:30 pm ---are u referring at me? question 7 is about vector :/
--- End quote ---
sorry i was answering to aloha.
SkyPilotage:
--- Quote from: physichemaths on May 18, 2011, 01:53:30 pm ---http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w10_ms_31.pdf
how to do question 7 part ii?
--- End quote ---
General Point of OP is (1+t)i+(2+t)j+(2-t)k
Dot product of OP.Direction vector of AB = 0 since they are perpendicular.--> you will get t=-1/3
Substitute in GM of OP and there you have it...
........:
Sorry I did a mistake.
Should have taken radius as one unit.
yeah so check the x and y values for the lowest point
y/x will give you tan of the argument
leebux101:
--- Quote from: Dumb economist on May 18, 2011, 02:35:13 am ---as for the second part
listen when there is a equation like y^2/y^3+1 the only way to integrate this is when you differentiate the denominator the exact value should come in the numerator. In this case the differentiation of y^3+1 is 3y^2 but in the numerator it is y^2 so you take the 3 out by multiplying it by 1/3. so now it comes 1/3(y^2/y^3+1)and then you get 1/3ln(y^3+1)
--- End quote ---
so i am kinda right?
........:
--- Quote from: leebux101 on May 18, 2011, 02:48:25 pm ---so i am kinda right?
--- End quote ---
Yes sir/Madam.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version