Question

1.scrieti numarul -30 ca o suma a cinci nr intregi,trei pozitive si doua negative
2. a)[5 la puterea 3*(-5) la puterea5]totul la puterea 2:5 la puterea 14
b)[(-7) puterea 13 *(+7)la puterea 3:(-7) la puterea 45

Answer 1

1. 2+3+4+(-16)+(-23)

2. a) [5^3 * (-5)^5]^2 : 5^14=
=[(-5)^8]^2 : 5^14=
=5^16 : 5^14=
=5^2=
=25
b) (-7)^13 * 7^3 : (-7)^45=
=(-7)^16 : (-7)^45=
=7^-29

Answer 2

1)
20 + 35 + 25 + (-68) + (-42) = - 30
2)
a) [ 5^3 x (-5)^5 ]^2 : 5^14 = [(-5)^8^2 : 5^14 = (-5)^16 : 5^14 = 5^2 = 25 

b) [ (-7)^13 x 7^3 : (-7)^45 = (- 7)^16 : (-7)^45 = 7^-29 = 1/7^29