Question

Diketahui suatu fungsi dengan rumus f(2x + 5) = 5x + 3. Nilai dari f(-3) adalah

Answer 1

Verified answer

Kelas 8 Matematika
Bab Fungsi

2x + 5 = -3
2x = -3 - 5
x = -8/2
x = -4

5x + 3
= 5 . (-4) + 3
= -20 +3
= -17

Answer 2

F(2x + 5) = 5x + 3
f(-3) ....?

berarti :
2x + 5 = -3
2x = -8
x = -4

sehingga f(-3) = 5.(-4) + 3
= -20 + 3
= -17