For example, it is used to find local/global extrema, find inflection points, **solve** optimization **problems**, and describe the motion of objects. In calculus, the *derivative* is a measure of how a function changes as its input changes. (And you may need it someday to *solve* some improper integral *problems*, and also for some infinite series *problems*.) As with most limit *problems* — not counting no-brainer *problems* — you can’t do with direct substitution: plugging 3 into x gives you 0/0, which is undefined.

## Solve derivative problems

The "simple" __derivative__ of a function with respect to a variable is denoted either or provided the __derivative__ is known to exist. The **derivative** of a function represents an infinitesimal change in the function with respect to one of its variables.

Simply take the

derivativeof the numerator and denominator.

### Solve derivative problems

#### Solve derivative problems

Wolfram|Alpha s Mathematica's `D` function, which uses a table of identities much larger than one would find in a standard calculus textbook. It uses "well known" rules such as the linearity of the **derivative**, product rule, power rule, chain rule, so on.

Being able to find a __derivative__ is a "must do" lesson for any student taking Calculus. ENGLISH TO PERSIAN WRITING GOOGLE Additionally, `D` uses "lesser known" rules to calculate the *derivative* of a wide array of special functions.

Solve derivative problems:

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