## First Derivative

Press
to access the first derivative option
which algebraically finds the first derivative of an expression
with respect to a variable at a value. If the value is omitted,
the current value of the variable is used.

Next, enter an expression, the variable, and a value
separated by commas. For example, to find the first derivative of y = x^{3}
at x = 2, enter

3
2

For f(x) = x^{3}, f'(2) = 12.

**Note:** Unfortunately, the TI cannot differentiate some functions
algebraically. For these functions use the less accurate
numerical differentiation option nDer.