Question

calculati:ex. 6)b.
efectuati:ex.7)a.
calculați:ex.12)c.f.
va rog e urgent.

Answer 1

12.
c)  20^-4*15^-3/30^-7=
=2^-4*10^-4*3^-3*5^-3/3^-7*10^-7=
=2^-4*10^3*3^4*5^-3=
=2^-4*2^3*5^3*3^4*5^-3=
=2^-4*2^3*5^3*81*5^-3=
=81*2^-1=
=81*1/2=
=81/2

f) 2³*(2^-6)²=
=2³*2^-12/(2²)²=
=2^-9/2^4=
=1/2^13=
=1/8192