# What does $F'$ and $F''$ mean?

I'm trying to learn what a Taylor series is, This is the equation I'm looking at and I know 0 calculus. I have been told that $$F'(x)$$ is a derivative but what does $$F''(x)$$ mean?

• shouldn't it be "what do $F'$ and $F''$ mean?" – mathworker21 Apr 17 '19 at 5:18
• What do you mean? that's what I wrote. – Loren Meehan Apr 17 '19 at 5:23
• @LorenMeehan : No, you used a double quote. The comment used two single quotes, which could have been a hint that it's more like (F')' :) – vsz Apr 17 '19 at 6:04
• oh, ok. thanks for clarifying. – Loren Meehan Apr 17 '19 at 7:09
• @vsz I italicized "do" for a reason... – mathworker21 Apr 17 '19 at 7:16

$$f''$$ denotes the second derivative of $$f$$; that is to say, it is the derivative of the derivative of $$f$$.