diketahui f(x) = ax+b f(5) = 20 f(-3) = -4 tentukan 2a + b =

f(x)= ax+b
f(5)=20
f(-3)=-4

jawab:
f(x)=ax+b
f(5)= a×5+b=20
5a+b=20

f(x)= ax+b
f(-3)=a×(-3)+b=-4
-3a+b=-4

5a+b=20
-3a+b=-4
-------------- -
8a+....=24
8a=24
a=3

5a+b=20
5×3+b=20
15+b=20
b= 20-15
b=5

2a+b=......
2×3+5= 15+5
= 20




semoga membantu

gak tau√[tex] \sqrt{x} [/tex]