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maka.
A. Nilai bayangan dari (-3) dan 4 adalah
(1). f(x) = 2x - 3
f(-3) = 2(-3) - 3
f(-3) = (-6) -3
f(-3) = (-9)
(2). f(x) = 2x - 3
f(4) = 2(4) - 3
f(4) = 8 - 3
f(4) = 5
Jadi, nilai bayangan dari (-3) = (-9) dan bayangan dari 4 = 5
B. Nilai a, jika f (a) = 7
f(x) = 2x - 3
f(a) = 2a - 3 = 7
⇔ 2a = 7 - (-3)
⇔ 2a = 10
⇔ a =
⇔ a = 5
Jadi, nilai a tersebut adalah 5