Monday, July 27, 2009

A math question?ok I have to find 3 things for the equation f(x)=3x^2+5x-8?A.f(x+h)B.f(x+h...

What? Could you tell me what country you're from? I've never seen this kind of writing before. I for one am completely stymied.

A math question?ok I have to find 3 things for the equation f(x)=3x^2+5x-8?A.f(x+h)B.f(x+h...
I'm not for sure of your exact question but try this:





f(x+h) = 3(x+h)^2 + 5(x+h) - 8





Does that look right?





It's been a while
Reply:f(x)=3x^2+5x-8


=%26gt;3x^2+8x-3x-8


=%26gt;x(3x+8)-(3x+8)


=%26gt;(3x+8)(x-1)


x=8/3,1


for f(x+h) replace x by x+h
Reply:part A%26gt;f(x+h) part B.f(x+h)-f(x) part C.f(x+h)-f(x)/h





A. f(x+h) = 3(x+h)^2+5(x+h)-8 (replacing x by x+h)


f(x+h) = 3x^2 + 3h^2 + 6xh + 5x + 5h - 8





B. Substitute values for f(x+h) and f(x)


f(x+h) - f(x) = (3x^2 + 3h^2 + 6xh + 5x + 5h - 8) - (3x^2+5x-8)


f(x+h) - f(x) = 3h^2 + 6xh + 5h





C. f(x+h)-f(x)/h = 3h^2 + 6xh + 5h / h = 3h + 6x + 5


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