C(30,2)
    C(30,15)
    100-20*log(10,314)-20*log(10,sqrt(1+314*314))+20*log(10,sqrt(1+314*314/4))-40*log(10,sqrt(1+314*314/625))
    100-20*log(10,12.79)-20*log(10,sqrt(1+12.79*12.79))+20*log(10,sqrt(1+12.79*12.79/4))-40*log(10,sqrt(1+12.79*12.79/625))
    -90-2*arctan(12.79/25)-arctan(12.79)+arctan(12.79/2)
    -90-2*arctan(314.320444/25)-arctan(314.320444)+arctan(314.320444/2)
    90-2*arctan(314.320444/25)-arctan(314.320444)+arctan(314.320444/2)
    -90+2*arctan(12.794192/25)
    -90-2*arctan(314.320/25)
    -90-2*arctan(87.172/25)
    e1e2e1*abs610
    e1e2e1--abs610
    e1e2e1-abs610
    e1e2e1+abs610
    e3e2e3+abs870
    e3e2e3-abs870
    4023—75
    e2/4-0.75
    =1.9×0.39×182.75/(2×〖10〗^5 )×（1.9×40+0.08×25/0.01）
    0.131×150×280×9.6/360

Home page << page1914 page1915 page1916 page1917 page1918 ... ... page1929 page1930 page1931 page1932 page1933 >> Last page 3377 pages in total