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Cea mai mare solutie naturala a inecuatiei 5·(x+1)+2³ · 3 <6·9 este.....

Răspuns :

5x+5+8*3<54
5x+5+24<54
5x+29<54
5x<54-29
5x<25
x<25/5
x<5
x∈{1,2,3,4} 
S={4}
5x(X+1)+8x3<6x9
5x(X+1)+24<54
5x(X+1)<54-24
5x(X+1)<30
X+1<30:5
X+1<6
X<6-1
X<5
Sol sunt: 0,1,2,3,4 
Cea mai mare sol este 4
v: 5x(4+1)+8x3<6x9
5x5+24<54
25+24<54
49<54 (A)