Решите систему уравнений и неравенств:а){x-6/2-y+1/3=12-y/4-x-1/2=2б){6x²-5x+1<04x-1≥0

Question

Решите систему уравнений и неравенств:
а){x-6/2-y+1/3=1
2-y/4-x-1/2=2
б){6x²-5x+1<0<br>4x-1≥0

Answer 1

A)3x-18-2y-2=6⇒3x-2y=26
2-y-2x+2=8⇒-2x-y=4 /*-2⇒4x+2y=-8
прибавим
-х=18⇒х=-18
у=4+2*(-18)=4-36=-32
б)D=25-24=1⇒х1=(5-1)/12=1/3 U x2=(5+1)/12=1/2⇒1/34x≥1⇒x≥1/4
x∈(1/3;1/2)