g(x) = ax+b jika g(3) = 13 g(-2)= -12 Tentukan notasi fungsi : a. f(-7) b. f(10) c. f(10) - f(-7)
Matematika
TheDefenderofTruth
Pertanyaan
g(x) = ax+b jika
g(3) = 13
g(-2)= -12
Tentukan notasi fungsi :
a. f(-7)
b. f(10)
c. f(10) - f(-7)
g(3) = 13
g(-2)= -12
Tentukan notasi fungsi :
a. f(-7)
b. f(10)
c. f(10) - f(-7)
1 Jawaban
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1. Jawaban filomc
Rumus Fungsinya adalah:
g(x) = 5x - 2
maka:
A. g(-7) = 5(-7) - 2
= -37
B. g(10) = 5(10) -2
= 48
C. f(10) = 48
f(-7) = -37, maka
48 - (-37) = 85
Cara mencari rumus fungsi:
g(3) = 3a + b = 13
g(-2) = -2a +b = -12
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5a = 25
a = 5
Cara mencari b: Gunakan salah satu persamaan, lalu substitusikan:
5(3) + b = 13
b = 13 - 15
b = -2