Question

EX.4 (H,I,J)VĂ ROG SA MĂ AJUTATI.

Answer 1

H) (9/3+1/3):(3^25:3^23+1)=
10/3:(3^2+1)=10/3:(9+1)=
10/3:10=1/3
I) (1/3+(2•3+1)/3•9/7):4/9 =
(1/3+7/3•9/7)•9/4=( 1/3+3)•9/4= (1/3+9/3)•9/4= 10/3•9/4=10/1•3/4 =30/4=15/2 .
J) (7-(5•4+1)/4)^20:[3/2+25/16]^10=(28/4-21/4)^20:(24/16+25/16]^10=(7/4)^20:(49/16)^10= [(7/4)^2]^10:(49/16)^10= (49/16)^10:(49/16)^10 =1