Question

Calculați: (5la puterea 0 + 5 la puterea 1 +5 la puterea 2 +5 la puterea 3):2 la puterea2
(7la puterea 0 + 7 la puterea 1 +7la puterea 2 - 3la puterea 2): 2la puterea4
(2la puterea0+ 2la puterea1+ 2la puterea2 +2la puterea3 +3la puterea2):2 la puterea 2

Answer 1

(5^0+5^1+5^2+5^3)÷2^2=(1+5+25+125)÷4=156÷4=39
(7^0+7^1+7^2-3^2)÷2^4=(1+7+49-9)÷16=48÷16=3
(2^0+2^1+2^2+2^3+3^2)÷2^2=(1+2+4+8+9)÷4=24÷4=6