Question

Diketahui rumus suatu fungsi f(x) =ax+b, f(3)=5 dan f(-1)=-3. nilai f(4) adl

Answer 1

F(x) = ax + b

f(3) = 3a + b = 5
f(-1) = -a + b = -3
----------------------- -
4a = 8
a = 2

3a + b = 5
3(2) + b = 5
6 + b = 5
b = -1

f(4) = 2(4) + (-1) = 7