23X12=?
23X12=?
28.12 9.2812 28.28fx=x12 x根9
奥数题17X12=238只移动一根火柴
14.12 9.1412 14.14fx=x12 x根9
12.8X34.5+12.8X12.3+46.8X87.2=?
lingo 语句,当(x11+x12)>0,(x11+x12)=1,否则为0;怎样写语句啊,
matlab循环计算x11=0.3 x21=0.4x12=0.254273-0.155503x11+0.560625x2
/|a||b|=27.12|b|^27/|b|^2712 -x根5=x12-x根542
40+50x12-8=240在式子中加上括号,使等式成立!
9.12 9.2812 28.91212 -x根9=x12-x根942
model: min=800*x11+1000*x12+1200*x13+700*x21+500*x22+700*x23
方程91+4x12.5和x-0.48x=7.28,这两个方程怎么解,