Which formula defines the sequence f1=5, f2=9, f3=13, f4=17, f5=21? a. f1=5, fn=4+fn-1 for n2
b. f1=5, fn=9+fn-1 for n2
c. f1=5, fn=2+fn-1 for n2
d. f1=9, fn=5+fn-1 for n2

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1