Question

Diketahui f(x) = 4x - 3 dengan f(a) =1 dan f(2) = b, maka nilai dari a+b adalah.......

Answer 1

F(x) = 4x - 3

f(a) = 1
1 = 4a - 3
1 + 3 = 4a
4 = 4a
a = 1

f(2) = b
4(2) - 3 = b
8 - 3 = b
b = 5

a + b = 1 + 5
a + b = 6

Jadi, nilai a + b = 6

Answer 2

F(x) = 4x - 3

f(a) = 4a - 3
1 = 4a - 3
4a = 4
a = 1

f(2) = 8 - 3
b = 5
__________________
a+b = 1 + 5 = 6