Penjelasan dengan langkah-langkah:
f(x) = ax + b
f(3) = 1
a(3) + b = 1
3a + b = 1.....(1)
f(1) = -1
a(1) + b = -1
a + b = -1
3a + b = 1
________-
2a = 2
a = 2/2
a = 1
1 + b = -1
b = -1 - 1
b = -2
f(x) = x - 2
f(-2) = -2 - 2
f(-2) = -4
a). nilai a = 1 dan b = -2
b). f(x) = x - 2
c). nilai f(-2) = -4
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Penjelasan dengan langkah-langkah:
f(x) = ax + b
f(3) = 1
a(3) + b = 1
3a + b = 1.....(1)
f(1) = -1
a(1) + b = -1
a + b = -1
3a + b = 1
a + b = -1
________-
2a = 2
a = 2/2
a = 1
a + b = -1
1 + b = -1
b = -1 - 1
b = -2
f(x) = ax + b
f(x) = x - 2
f(-2) = -2 - 2
f(-2) = -4
a). nilai a = 1 dan b = -2
b). f(x) = x - 2
c). nilai f(-2) = -4