Question

Calculati media aritmetica a numerelor:
a=$2^{30}$:$2^{28}$-($3^{2}$)$^{40}$:$3^{80}$

b=(7,5+3,4)·2-1,5

Dau coroana!

Answer 1

a=2^30:2^28-(3^2)^40:3^80
a=2^2-3^80:3^80
a=4-1
a=3

b=(7,5+3,4)*2-1,5
b=10,9*2-1,5
b=21,8-1,5
b=20,3

(a+b):2=
=(3+20,3):2=
=23,3:2=11,65(media aritmetica)