# What is notation for the Second Derivative?

##### 1 Answer

If you prefer Leibniz notation, second derivative is denoted

Example:

If you like the primes notation, then second derivative is denoted with two prime marks, as opposed to the one mark with first derivatives:

Similarly, if the function is in function notation:

Most people are familiar with both notations, so it doesn't usually matter which notation you choose, so long as people can understand what you're writing. I myself prefer the Leibniz notation, because otherwise I tend to confuse the apostrophes with exponents of one or eleven. Though the primes notation is more shorthand and quicker to write, so many people prefer it.