Question

Imi spune si mie cineva va rog frumos cum se rezolva exercitiul \2x\=

Answer 1

/2x/= 2x, x>0
        2x, x<0

/2x/<=1   / impartim prin 2
/x/<=1/2
=> x∈{-1/2; 1/2}

|x/3 - 5/6|>1/3
|(2x-5)/6|>1/3  |*6
|2x-5|>1/3 *6
|2x-5|>2  |+5
|2x|>7
|x|>7/2
x∈{-7/2, 7/2}