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a) f(3) = 3.3+2 = 9+2 = 11
f(5) = 3.5+2 = 15+2 = 17
b) f(a) = 47
3a+2 = 47
3a = 47-2
3a = 45
a = 15
a. f(3) = (3*3)+2 = 9 + 2 = 11
f(5) = (3*5)+2 = 15 + 2 = 17
b. f(a)=47
maka f(a)= (3*a)+2=47
3a + 2 = 47
3a=47-2
a=45 ÷ 3
a=15