f(2m+1)=10m+2 maka nilai f(2) =

langsung aja y

misal :
2m + 1 = a
m = a-1 / 2

soal menjadi →
f(a) = 10 (a-1 / 2) + 2
f(a) = 5(a-1) + 2
f(a) = 5a - 5 + 2
f(a) = 5a - 3

f(x) = 5x - 3
f(2) = 5(2) - 3
f(2) = 10 - 3
f(2) = 7

semoga berguna +_+