Question

repedee raspus 3 , 4 cu toate etapele de rezolvare

Answer 1

3.a) b=(4^5)^3÷(2×2^2×2^3×2^4)^3
=4^15÷(2 la puterea 1+2+3+4)^3
=4^15÷(2^10)^3
=(2^2)^15÷2^30
=2^30÷2^30
=1 D

b) a=2^2×2^3-5^5÷5^3-(7^5)^0
=2^5-5^2-1
=32-25-1
=6 A

4.a) 81^7÷3^5^2
=(3^4)^7÷ 3 la puterea (5^2)
=3^28÷ 3 la puterea (5^2)
=3^28÷3^25=3^3
=27

b) 4^12÷2^22-8^9÷2^26
=2^24÷2^22-2^27÷2^26
=2^2-2=4-2
=2

c) (25^2×5^4)^3 ÷5^22- 2^2^2
=[(5^2)^2 ×5^4]^3 ÷5^22-2^4
=(5^4×5^4)^3 ÷5^22-16
=(5^8)^3 ÷5^22-16
=5^24 ÷5^22 -16
=5^2 -16=25-16
=9