Question

Va rog ajutati-ma la ll ex 2
Va rog muult,va ajut si eu daca am cu ce​

Answer 1

a)

^ - inseamna "la puterea"

[(-2)^3]^10 : (-2)^27 = (-2)^(3·10)×(-2)^(-27) = (-2)^(30-27)=(-2)^3= -8

b)

x-pret initial

x-x·2/100=343 ⇔ x·98/100=343 ⇔x =343·100/98 =350

pret initial = 350

c) 4x+7<3 ⇔4x<-4 ⇔ x< -1

x ∈ Z ⇒ x ∈ {...., -5, -4, -3, -2}