i really stuck on
Show that |cn+1−cn| = 1/FnFn+1.
Prove by induction thatFn>=10^n/6 for all n >=4. [Hint: you may need to do the cases n = 4, . . . ,9 to start the induction, and let the inductive step go from n to n+6.]
Can you please give me tips on how to start them of thanks