6x²-5x+1＜0
    35*0.92^x<8
    lna＞a-1/a+1
    0.8^k<=0.1
    2x-6>6
    3x+1>2x+2
    20*0.92^x<6.5
    0.92^x*80*0.75<13
    0.92^x*80<13
    0.5m+1.2(36-0.5m）≤40
    3X—7>5
    100n^2＜2^n
    135t²+2t-25＜0
    6—5x小于等于—4
    -1/3<1/x<3
    -1/3<1/(x-1)<3
    -1<2/(x-1)<0
    -1<2/x-1<0
    -1/3<1/x<3
    0<(x+1)/(x-1)<1

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