# Basics of differentiation

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The derivative of a function is the rate of change of the function with repsect to the given variable. The derivative of the linear expression x is 1. A linear expression of form ax has a derivative of a.

A polynomial can be differentiated by multiplying the coefficients of each variable by their exponent and subtracting one from the exponent of each variable.

The Constant Rule states that the derivative of a constant function is 0.

When differentiating fractions, the given fraction should be separated if it has more than one term in its numerator. The terms of the variable in the denominator which are raised to a power must then be brought to the numerator by changing its power to its negative. If the power involves roots, it must be turned into a fractional power.

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