9x+4(50-x)≤360 3x+10(50-x)小于等于290
    2.9736a+722.9 ＜3.2667a
    -x^2+x+2＞0 -6x^2+x+1＞0
    −6x^2+x+1＞0
    -x^2+x+2＞0
     sqrt(xx+2)-sqrt(xx+1) >0
     sqrt(xx+1)-sqrt(xx+2) >0
     sqrt(xx+1)+sqrt(xx+2) >0
    2-(1/x)＞0
    (2/x^3)+(1/x^4)＜0
    (2/x)+(1/x^2)＜0
    2x^3+x^2＜0
    0.77x^2+1456.462x-2766.4＞0
    770x^2+1918x-2766＞0
    w/26+(540-w)/18<=25
    w/26+(540-w)/18<=25
    （1+x）x≤4046
    1000-10n＞1.645√n
    -4X>0
    (x+1)cosx>0

Home page << page215 page216 page217 page218 page219 ... ... page230page page231page page232page page233page page234page >> Last page 1275 pages in total