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Given $f(x)=cx^3-9x+3$ and $f(2)=9$, find the value of $c$.

Guest Nov 10, 2014

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Best Answer

+130511

+5

So...we want to solve

9= c(2)^3 - 9(2) + 3

9 = 8c - 18 + 3

9 = 8c - 15 add 15 to both sides

24 = 8c divide by 8 on both sides

3 = c

CPhill Nov 10, 2014

1⁺⁰ Answers

+130511

+5

Best Answer

So...we want to solve

9= c(2)^3 - 9(2) + 3

9 = 8c - 18 + 3

9 = 8c - 15 add 15 to both sides

24 = 8c divide by 8 on both sides

3 = c

CPhill Nov 10, 2014

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