Soal/Latihan Fungsi dan Grafik pertemuan ke-9

 Soal

2. f(t) = 1/t
4. g(t) = 1/1+t
6. f(x) = 8x, carilah dan gambarkan f(-2) sd f(2)
8. gambarlah fungsi f(x) = 2x2 + 4x + 5
10. f(x) = 1 + x2

Jawab

2. 
Df = {x| x ≠ 0, x ∈ R}
Rf = {y| y ≠ 0, y ∈ R}

4.
Domain = 1 + t ≥ 0
t ≥ -1

Df = {t | t ≥ -1, t ∈ R}
Rf = {t | t ∈ R}

6.
f(-2) = 8(-2) = -16
f(-1) = 8(-1) = -8
f(0) = 8(0) = 0
f(1) = 8(1) = 8
f(2) = 8(2) = 16

x	f(x) = 8x
-2	-16
-1	-8
0	0
1	8
2	16

8.
(-3, 11)
(-2, 5)
(-1, 3)
(0, 5)
(1, 11)

10.
Df : { x |  x ∈ R }
Rf : { x | x ∈ R }