diketahui f ( x ) = ax+b, f( -1 ) = -5 dan f (4) = 5 a.tentukan nilai a dan b serta rumus fungsinya b.tentukan nilai f, ( -6 )
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a. a = 2
b = -3
f(x) = 2x - 3
b. -15
Penjelasan dengan langkah-langkah:
f(x) = ax + b
f(-1) = -1a + b = -5
f(4) = 4a + b = 5
----------------- -
-5a = -10
a = -10/-5
a = 2
1a + b = -5
-2 + b = -5
b = -5 + 2
b = -3
a. a = 2
b = -3
f(x) = 2x - 3
b. f(-6) = 2.(-6) - 3
= -12 - 3
= -15
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