I'm trying to prove the following:
L2k−5F2k=4(−1)kk≥1
Lk is the kth term of the Lucas numbers and Fk is the kth term of the Fibonacci sequence.
I've tried using mathematical induction, however it's not working out too well. I tried starting out by manipulating L2k+1−5F2k+1, but I can't prove that it equals 4(−1)k+1.
Any help is greatly appreciated!
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