Monday

September 22, 2014

September 22, 2014

Posted by **Leanna** on Tuesday, September 21, 2010 at 6:51pm.

(f(3+h)-(f(3-h))/2h

- Calculus -
**bobpursley**, Tuesday, September 21, 2010 at 7:05pmfirst, f(3+h)=(3+h)^2 -2(3+h)

= 9+6h+h^2-6-2h = h^2+4h+3= (h+3)(h+1)

second f(3-h)=(3-h)^2 -2(3-h)=

= 9-6h+h^2-6+2h=h^2-4h+3=(h-3)(h-1)

so first -second then is

h^2-h^2+4h+4h +3-3=8h

finally, lim 8h/2h=4

check all that.

- Calculus -
**Leanna**, Tuesday, September 21, 2010 at 7:18pmThank you for your help!

For the second part I thought it would be -(9+6h-h^2)-6+2h?

- Calculus -
**bobpursley**, Tuesday, September 21, 2010 at 8:29pmyou put a minus sign in front of the first term? Why?

- Calculus -
**bobpursley**, Tuesday, September 21, 2010 at 8:30pmand, the 6h term in (3-h)^2=9-6h+h^2

- Calculus -
**Leanna**, Tuesday, September 21, 2010 at 9:01pm(f(3+h)-(f(3-h))/2h

I put a minus sign because it has a negative in front of the f(3-h) so it's -(f(3-h))

**Answer this Question**

**Related Questions**

Calculus - Hi! My question is: Given that f is a function defined by f(x) = (2x...

Calculus, need help again... - If the function f is defined by f(x)=x^2-2x, find...

Calculus - Give an example of a function f which is defined at c which limit as ...

calculus - 1)A function g is defined for all real numbers and has the following ...

calculus help please - hi what is lim as x reaches one of the function x/LN(x) ...

Clueless in calculus - The function f is defined by f(x)= (25-x^2)^(1/2) for -5 ...

Calculus - A cubic polynomial function f is defined by f(x) = 4x^3 + ax^2 + bx...

Calculus - A cubic polynomial function f is defined by f(x) = 4x^3 + ax^2 + bx...

Calculus - Suppose you have a rational function that its denominator is (X-c) ...

Calculus - f(x) = {x^3 - 1, x> or equal to -1 {2x,x<-1 find limit x->-1...