Question

Dau coroana si toate punctele ce le am

Answer 1

Răspuns:

E1=(2x-5)/3

E2=(4x+1)/5

a)E1<E2:

(2x-5)/3<(4x+1)/5

5(2x-5)/15<3(4x+1)/15

(10x-25-12x+3)/1515<0

-2x-22/15<0|*15

-2x-22<0

-2x<22

x<-11

b)E1+E2=nr pozitiv,

E1+E2>0

(2x-5)/3+(4x+1)/5>0

5(2x-5)/15+3(4x+1)/15>0

10x-25+12x+1/15>0

22x-24/15>0|*15

22x-24>0

22x>24

x>24/22

x>12/11

c)E1>0

E2<=0

{(2x-5)/3>0

{(4x+1)/5<=0

{2x-5>0

{4x+1<=0

6x-4=0

6x=4

x=4/6