Jawabanmu

2014-08-17T10:50:04+07:00
= 3^7 x 7^3 x 2^1 / (42)^3
=2187 x 343 x 2 / 74088
= 1500282
/ 74088 = 20,25

2014-08-17T10:56:16+07:00
   3^7 x 7^3 x 2 / (42)^3 
= 3^7 x 7^3 x 2 / (21 x 2 )^3
=3^7 x 7^3 x 2 / (21)^3 x 2^3
=3^7 x 7^3 x 2 / (3x7)^3 x 2^3
=3^7 x 7^3 x 2 / 3^3 x 7^3 x 2^3
=3^4 / 2^2 atau 3^4 x 2^-2

Ingat : a^m / a^n = a^m-n

semoga membantu :)