Diketahui fungsi f(x)=-5x+c dan f(-8)=14. tentukan hasil dari f(4) - f(2)
Matematika
ahundarimyoxev7f
Pertanyaan
Diketahui fungsi f(x)=-5x+c dan f(-8)=14. tentukan hasil dari f(4) - f(2)
2 Jawaban
-
1. Jawaban ademayaprwtxr
f(-8) = -5(-8) + c = 14
= 40 + c = 14
c = 14 - 40 = - 26
f(4) = -5(4) + (-26)
= -20-26
= -46
f(2) = -5(2) + (-26)
= -10-26
= -36
f(4) - f(2) = -46-(-36)
= -46 + 36 = -10 -
2. Jawaban Ajengput
f(x) = -5x+c
F(-8)--> -5(-8)+c = 14
40+c = 14
C = -26
Maka, fungsi f(x) = -5x-26
F(4) = -5(4) -26 = -20-26 = -46
F(2) = -5(2)-26 = -10-26 = -36
F(4) -f(2) = -46 -(-36) = -46+36 = -10