Question

Diketahui rumus fingsi f(x) = -2x + 6. Jika f(a) = 10 dan f(-3) = b,
Nilai dari a + b adalah...

Answer 1

f(a) = -2a + 6

10 = -2a + 6

a = -2

f(-3) = 6 + 6

b = 12

a+b = -2 + 12 = 10

Answer 2

Jawab:

a + b = 10

Penjelasan dengan langkah-langkah:

Diketahui :

f(x) = -2x + 6

f(a) = 10

f(-3)= b

1.

f(a) = 10 -> f(x) = -2x + 6

f(a) = -2(a) + 6 = 10

      -2a = 10 - 6

       -2a = 4

          a = -2

2.

f(-3) = b ->   f(x) = -2x + 6

f(-3) = -2(-3) + 6 = b

        6 + 6  = b

            12 = b

3.

a + b = -2 + 12 = 10