Question

Suatu fungsi dirumuskan f(x) = ax + b. jika f(2) = 14. maka nilai a dan b adalah.... jawab yaaaa

Answer 1

F(2) = 2a +b = 14
f(3) = 3a+b = -1      eliminasi
hasil  -a = 15 maka a = -15
        
3a + b = -1
3(-15) + b = -1
b = -1 +45
b = 44

Answer 2

F(x) = ax + b
f(2) = a.2 + b = 14
       = 2a + b = 14
f(3) = a.3 + b = -1
       = 3a + b = -1
3a + b = -1
2a + b = 14
_________-
a = -15

f(2) = -15.2 + b = 14
       = -30 + b = 14
       = b = 14 + 30
       = b = 44

rumus f(x) = 15.x + 44