2.Tentukan hasil operasi bilangan berpangkat berikut ini.
a. 31 + 30
b. (–2)-6
c. (–33) × (–30)
d. (1/6)-3
e. (-2/3)-2
Jawaban:
a. 31 + 30 = 3 + 1 = 4
b. (–2)-6 = 1/(-2)6 = 1/64
c. (–33) × (–30) = -27 x 1 = -27
d. (1/6)-3 = (6/1)3 = 216
e. (-2/3)-2 = (3/-2)2 = 9/4
3.Tentukan hasil operasi bilangan berpangkat berikut ini.
a. 23 x 24/26
b. (-1/4)-4 x (-1/4)0 x (-1/4)4
c. 1/35 x 1/3-7
d. (–7)4 × 73
Jawaban:
a. 23 x 24/26 = 23+4-6 = 21 = 2
b. (-1/4)-4 x (-1/4)0 x (-1/4)4 = (-1/4)-4+0+4 = (-1/4)0 = 1
c. 1/35 x 1/3-7 = 1/35+(-7) = 1/3-2 = 32 = 9
d. (–7)4 × 73 = 74 × 73 = 74+3 = 77 = 823.543
4.Sederhanakan dalam bentuk pangkat negatif.
a. abc/a3bc4
b. 55/52
c. b5/b-3
d. r6 x r-6
Jawaban:
a. abc/a3bc4 = a1-3b1-1c1-4 = a-2c-3
b. 55/52 = 1/52-5 = 1/5-3
c. b5/b-3 = 1/b-3-5 = 1/b-8
d. r6 x r-6 = r6-6 = r0 = 1
5.Sederhanakan dalam bentuk pangkat positif.
a. 2m–4 × m–3
b. 67/63
c. b-6/b-3
d. 1/a3bc-4
Jawaban:
a. 2m–4 × m–3 = 2m-4+(-3) = 2m-7 = 2/m7
b. 67/63 = 67-3 = 64
c. b-6/b-3 = 1/b-3+6 = 1/b3
d. 1/a3bc-4 = c4/a3b