а) 6х²-7х+1⩽0
D=49-24=25⇒xx=(7-5)/12=1/6 U x2=(7+5)/12=1
+ _ +
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1/6 1
1/6≤x≤1
4х-3⩽0 ⇒4x≤3⇒x≤0,75
x∈[1/6;0,75]
б) х-5/х>0
x=5 x=0
+ _ +
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0 5
x<0 U x>5
х-2>0 ⇒x>2
x∈(5;∞)