Tolong ya buat bljr lthn UAS 17-20

17. f(x) = (x + 1) ^3
f(2) = ( 2 + 1) ^3 = 3^3 = 27
dll
Jadi D

18. f(a+5) = -3(a + 5) + 2
= -3a – 15 +2
= -3a – 13
jwb a.-3a – 13

19. g(x) = px + q
g(-3)= (-3) p + q = -21
-3p + q = -21 …. (1)

g(4) = 4p + q
7 = 4p + q …..(2)

eliminasi pers 1 &2
-3p+q = -21
4p + q = 7
——————— –
-7p = -28
p = 4

subs nilai p= 4 ke pers 1
-3p + q = -21
-3(4) + q = -21
-12 + q = -21
q = -21 +12
q = -9

jadi nilai p + q = 4 – 9
= -5
20. b. f(x) = 2x + 1
f(-1) = 2(-1) + 1
= -1
f(0) = 2(0) +1
= 1
f(1) = 2(1) +1 =3
f(2) = 2(2) +1 =5