.Nilai minimum fungsi f(x) = x² - 5x + 4 adalah ....
Jawab:
[tex]\frac{9}{4}[/tex]
Penjelasan dengan langkah-langkah:
X min = -b/2a = -(-5)/2 = 5/2
Substitusi X min ke persamaan f(x) = x^2 - 5x + 4
Didapat nilai minimum f(x) = -9/4
Jawaban:
f(x) = x² - 5x + 4
f(x) = 2x - 5
2x - 5 = 0
2x = 5
x = 5/2
f(5/2) = (5/2)² - 5(5/2) + 4
f(5/2) = 25/4 - 25/2 + 4
f(5/2) = -9/4
(5/2, -9/4)
Tags
Matematika