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queena0927
Mar 8, 2009, 12:29 PM
find the difference quotient for f(x)= 3x-7

galactus
Mar 8, 2009, 12:43 PM
By difference quotient, I suppose you mean:

\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}?

\lim_{h\to 0}\frac{[3(x+h)-7]-(3x-7)}{h}

Simplify, take the limit, and you should get the derivative of 3x-7 (which is 3).

MissGabby
Oct 12, 2010, 06:26 PM
3

MissGabby
Oct 12, 2010, 06:49 PM
Thank You Very Much