Question

Diketahui fungsi f(x) = ax + b, f(2) = 1 dan f(-1) = -11. nilai dari a + b adalah​

Answer 1

f(x) =ax+ b

f(2)=2a + b f(-1) =-1a+b

1=2a+b -11=-1a+b

*eliminasi *sibtitusi

1=2a+b 1=2a+b

-11=-1a+b 1=2(4) +b

______________- 1=8+b

12=3a 1-8=b

12/3=a -7=b

4=a

jadi, nilai a+b=4+(-7)

=-3