diketahui rumus fungsi L(x) = ax + b dan L(-1) = 1 serta L(2) = 4,maka a + b adalah
Matematika
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Pertanyaan
diketahui rumus fungsi L(x) = ax + b dan L(-1) = 1 serta L(2) = 4,maka a + b adalah
2 Jawaban
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1. Jawaban adinda6788
L(x) = ax + b
• L(-1) = a(-1) + b
1 = -1a + b
• L(2) = a(2) + b
4 = 2a + b
4 = 2a + b
1 = -1a + b
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3 = 3a
1 = a
4 = 2a + b
4 = 2(1) + b
4 = 2 + b
4 - 2 = b
2 = b
maka, a + b = 1 + 2 = 3 -
2. Jawaban fadilahpth
L(x) = ax + b
L(-1) = a(-1) + b = 1
-1a + b = 1
b = 1 + 1a
L(2) = a(2) + b = 4
a(2) + 1(1+1a) = 4
2a + 1 + 1a = 4
3a = 4 - 1
3a = 3 a=1
L(2) = 1(2) + b = 4
2 + b = 4
B = 4 - 2 = 2
a + b = 1+2 = 3