Di Ketahui Fungsi F(×) = a× + b jika f(2) = -2 dan f(3 = 13 , Tentukan Nilai f(4)
No ngasal
^^
Matematika Kelas 8
Halaman 115
No 9
No ngasal
^^
Matematika Kelas 8
Halaman 115
No 9
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28
Penjelasan dengan langkah-langkah:
f(x) = ax + b
mencari a dan b
f(2) = 2a + b = -2
f(3) = 3a + b = 13
------------------ +
-a. = -15
a = -15/-1 = 15
2a + b = -2
2.15 + b = -2
30 + b = -2
b = -2 - 30
= -32
bentuk persamaannya
f(x) = 15x - 32
f(4) = 15.4 - 32
= 60 - 32
= 28