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revolvati in inmultimea nr naturale inecuatiei 2(x+3)<307-251
rezolvati inmultimerea nr naturale : 2la puterea x+1<16


Răspuns :

2x+6<56
2x<256-6
2x<250
x<250/5
x<50
x∈{1,2,3,..............49}

2^x+1 <16
2^x+1<2^4
x+1<4
x<4-1
x<3
x∈{0,1,2}
2(x+3)<307-251
2(x+3) <56
2x+6<56
2x<50
x<25
x =(1,2...24)