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[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !

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haris94:
how will u differentiate         
12/x2-4x

........:

--- Quote from: haris94 on May 08, 2011, 12:59:14 am ---how will u differentiate         
12/x2-4x

--- End quote ---

http://www.wolframalpha.com/input/?i=Differentiate+12%2F%28x^2-4x%29

haris94:
thanx got it
cool website By the way

physichemaths:
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w10_ms_12.pdf

question 5 (b) how we know that we use the formula a(1-r^n)/1-r? why not we use a(r^n-1)/r-1??

elemis:

--- Quote from: physichemaths on May 08, 2011, 05:43:27 am ---http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w10_ms_12.pdf

question 5 (b) how we know that we use the formula a(1-r^n)/1-r? why not we use a(r^n-1)/r-1??

--- End quote ---

Both formulas are the same thing, you can use either.

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