Question

ajutot va rog urgent matematica​

Answer 1

Răspuns:

a)2(-x+1)=-6

-2x+2=-6

2x=8. x=4=>(3)

b)l2x-6l=0 2x-6≥0=>2x-6=0 x=3 (1)

2x-6<0 -2x+6=0 x=3

c)3/(x+1) €Z. x+1=±1;=±3;

x=0 x=-2. x=2. x=-4

suma 0-2+2-4=-4 (2)

d)3^x=2017^x

2017nu e divizibil cu 3

=>x=0. (4)