Question

Diketahui f(x+2= x2 + 4× + 1, nilai dari f (3) - f(1)=

Answer 1

Verified answer

Mapel : Matematika
Materi : Relasi dan fungsi

f(x + 2) = x² + 4x + 1

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

f(x) = x² - 4x + 4 + 4x - 8 + 1

f(x) = x² - 3

Sehingga
= f(3) - f(1)
= [3² - 3] - [1² - 3]
= [9 - 3] - [ 1 - 3]
= 6 + 3
= 9