Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

http://en.wikipedia.org/wiki/Cassini%27s_identity

In this equation:

$F_{n-1}F_{n+1}-F^2_n=(-1)^n$

$F^2_n$, what does that mean? Is it a summation signs for n to 2? I don't know what it means.

share|improve this question
2  
It's the number $F_n$ to the power of $2$. –  EuYu Nov 18 '12 at 1:29
    
ah ok thanks you could have answered instead –  George Nov 18 '12 at 1:30
add comment

1 Answer 1

$F_n^2$ is the square of the $n^{\text{th}}$ Fibonacci number.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.