Diketahui fungsi f(x)=ax+b,jika f(3)=6 dan f(2)= 7 maka nilai 3a+2b adalah

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Diketahui fungsi f(x)=ax+b,jika f(3)=6 dan f(2)= 7 maka nilai 3a+2b adalah

~Math

f(x) = ax +

f(3) = 3a + b

6 = 3a + b .. 1)

f(2) = 2a +

7 = 2a + b ..2)

Eliminasi pers 1 n 2

3a + b = 6

2a + b = 7

________-

a = -1

Substitusi nilai a pd pers 1

3a + b = 6

3(-1) + b = 6

-3 + b = 6

b = 6 + 3

b = 9

Nilai 3a + 2b

3( -1 ) + 2 (9)

= -3 + 18

= 15

#belajarbersamabrainly


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