SOAL & KUNCI JAWABAN Pelajaran Matematika Kelas 9 Hal 46 47 48 49 Latihan 1.4, Panjang Diagonal AB?

Soal nomor 5

a. 2m^-4 x m^-3
= 2m^-4+(-3)=-7

= 2/m⁷.

b. 6⁷/6³
= 6^{7-3 = 4}
= 64

c. b^-6/b^{-3 =} b^-6-(-3)=-4

= b^-3
= 1/b³

d. 1/a³bc^-4
= 1/a³ x b x 1/c^-4
= 1/a³ x b x c^4/1
= c⁴/a³b

Soal nomor 6

a. 18t³ x 2t^-3
= 18 x 2.t^3+(-3)=0
= 36.1
= 36

b. 2y⁰t³/y^6t-2
= 2y^0-6
=-6t^3-(-2)=5
= 2t⁵/y^6.

c. 2m⁰ x m^-7
= 2m^0+(-7)=-7
= 2m^-7.

d. m³ + 4/m^-3
= m³ + 4m³
= 5m³.

Soal nomor 7

d^-5 = 1/d x 1/d x 1/d x 1/d x 1/d = 1/d⁵

pernyataan tersebut salah karena d^-5 artinya 1/d⁵.