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Soal nomor 2
a. (-y)^5/(-y)^2
= (-y)^(5-2)=
= y3
b. (1/t)7/(1/t)3
= (1/t)^(7-3)=
= 1/t^7/1/t^3
= 1/t^7 . t^3/1
= t^3/t^7
= t^(3-4)
= 1/t^4
c. 3m^7/m^3
= 3m^(7-3)=
= 3m^4
d. 42y^8/12y^5
= 42/12 . y^8/y^5
= (7/2)y^3
e. ((1/t)^7 : (1/t)^3) x ((1/t)^3 : (1/t)^2)
= 1/t^7/1/t^3 x 1/t^3/1/t^2
= 1/t^7/1/t^2
= 1/t^7 . t2/1
= t^2/t^7
= t^(-5)
= 1/t^5
f. 3w^4/w^2 x 5w^3
= 3w^2 x 5w^3
= 15 w^5
Soal nomor 3
a. (0,2^4 x 0,2^2) : 0,25
= (0,2)^4+2(-5) = 1
= (0,2)^1
= 1/5
b. (-5)^5: (-5)^2 x (-5)^2
= (-5)^5-2+2
= (-5)^1
= -5
