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The formula used to compute an approximation for the second derivative of a function $f$ at a point $X_0$ is

1. $\frac{f(x_0 +h) + f(x_0 – h)}{2}$

2. $\frac{f(x_0 +h) - f(x_0 – h)}{2h}$

3. $\frac{f(x_0 +h) + 2f(x_0) + f(x_0 – h)}{h^2}$

4. $\frac{f(x_0 +h) - 2f(x_0) + f(x_0 – h)}{h^2}$

asked in Calculus | 202 views