Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Help Me ! » Differentiation from first principles » 2005-11-03 12:02:06

Qasim
Replies: 2

I have the equation y = x^3 + 12x - 9

Doing x = k and x = k+h I am doing differentiation

Anyway you get:

k^3 + 3k^2h + 3kh^2 + h^3 + 12k + 12h - 9 - (k^3+12k-9)
over k+h-k

Anyway I cancel the k's at the bottom and then divide the top by h

Now the answer states

3k^2h + h^3 +12h
Over h

I dont get how they got rid of the 3kh^2

#2 Introductions » Hello there » 2005-11-03 11:56:14

Qasim
Replies: 1

My name is Qasim and I have to do some Maths for my Accounting Degree

I had an A* grade at GCSE but its been a while and my maths is a bit rusty

Board footer

Powered by FluxBB