Question

va rog rezolvati exercitiile

Answer 1

2)
a+b+c = 57
a = 3b + 1
b = 3c + 1

a= 3*(3c+1)+1 = 9c+3+1 = 9c+4

9c+4+3c+1+c = 57 =>13c+5 = 57 =>13c=52 =>c=4
b=4*3+1=12+1=13
c=13*3+1=39+1=40

[tex]4) 2^{90}+2^{90}+2^{91}+2^{92}=2^{90}(1+1+2+4)=2^{90}*8=2^{93} \\ 2^{93} ....3^{62} \\ 2^{3*31}...3^{2*31} \\ 2^3\ \textless \ 3^2 \\ 2^{93}\ \textless \ 3^{62}[/tex]