Something simple as I thought! Thank you very much, this has finished off a proof I’ve been doing for quite a whileApply the exponent rule a^(m+n) = a^m * a^n.
-1 = -1 always. It does NOT depend on the parity of x.If x is even then -1=-1
If x is odd then 1=1
For clarity, I think what you meant was this proof by cases:I need to prove that (-1)^(x+1) = -(-1)^x
I can do it separately
If x is even then -1=-1
If x is odd then 1=1