Range dari pemetaan f:× 2×-7 untuk X€{2,3,4,5,6} adalah?

f(x) = 2x-7
f(2) = 2(2)-7
= 4-7
= -3
f(3) = 2(3)-7
= 6-7
= -1
f(4) = 2(4)-7
= 8-7
= 1
f(5) = 2(5)-7
= 10-7
= 3
f(6) = 2(6)-7
= 12-7
= 5

Jadi Rf = {-3, -1, 1, 3, 5}

Semoga membantu :)