Jika fungsi di rumuskan (f):Ax + B jika f(2):7 dan f(1):4 maka tentukan! a.nila A dan B b.rumus fungsi f(x) c.nilai f(0)
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ribkadimitri
A. Nilai a dan b * f(x) = ax + b *f(x) = ax + b f( 2) = 7 f(1) = 4 a.2 + b = 7 a.1 + b = 4 2a + b = 7........₁ a + b = 4..........₂ Eliminasi : 2a + b = 7 a + b = 4 _ a = 3 Subtitusi : a + b = 4 3 + b = 4 b = 4 - 3 b = 1 Jadi a = 3,b = 1
b.Rumus fungsi = ax + b = 3x + 1
c.Nilai f(0) = 3x + 1 = 3.0 + 1 = 0 + 1 = 1
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udink
F(2)==> 2A+B=7 f(1)==> A + B=4 -------------- - A. = 3 B=4-3=1 a. A=3 dan B=1 b. rumus fungsi f(x)=3x+1 c. f(0)=1
* f(x) = ax + b *f(x) = ax + b
f( 2) = 7 f(1) = 4
a.2 + b = 7 a.1 + b = 4
2a + b = 7........₁ a + b = 4..........₂
Eliminasi :
2a + b = 7
a + b = 4 _
a = 3
Subtitusi :
a + b = 4
3 + b = 4
b = 4 - 3
b = 1
Jadi a = 3,b = 1
b.Rumus fungsi = ax + b
= 3x + 1
c.Nilai f(0) = 3x + 1
= 3.0 + 1
= 0 + 1
= 1
f(1)==> A + B=4
-------------- -
A. = 3
B=4-3=1
a. A=3 dan B=1
b. rumus fungsi f(x)=3x+1
c. f(0)=1