How do you find f''(x) when f(x)=x-x^3?

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How do you find f''(x) when f(x)=x-x^3?

2007-12-08 01:03:39 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

4 answers

f'=1-3x^2
f''=-6x

2007-12-08 01:06:28 · answer #1 · answered by someone else 7 · 0⤊ 1⤋

there is really nothingto solve. You need to graph the Function. You can find the zeros (X intercepts) you can find where the function is increasing and decreasing.

2007-12-08 09:13:32 · answer #2 · answered by cpttango30 5 · 0⤊ 0⤋

f `(x) = 1 - 3xÂ²
f "(x) = - 6x

2007-12-08 10:26:12 · answer #3 · answered by Como 7 · 3⤊ 0⤋

f(x) = x - x^3
f'(x) = 1 - 3x^2
f''(x) = -6x

2007-12-08 09:26:15 · answer #4 · answered by jimbob 6 · 0⤊ 0⤋