Jika f(x) = ax + b, f(3) = 5 dan f(7) = 13, maka f(2) = ​

Jawab:

3

Penjelasan dengan langkah-langkah:

Jika f(x) = ax + b, f(3) = 5 dan f(7) = 13, maka f(2) = ​

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ax + b

3a + b = 5

7a + b = 13

__________-

– 4a = – 8

a = 2

3a + b = 5

3 x 2 + b = 5

6 + b = 5

b = 5 – 6

b = – 1

ax + b

2 x 2 + ( – 1 )

4 + ( – 1 )

4 – 1

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