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Find explicit rules for the following recursive sequences:
a) an = 2(anâ1) + 4;a1 = 5
b) an = 6(anâ1)â8(anâ2);a1 = 1,a2 = 0
f(5)=12 for a geometric sequence that is defined recursively by the formula f(n)=0.3×f(n-1) where n is an integer and n>0.Find f(7).
