化简 √6² √(-5)² √(-2X5)² √18
用简便方法计算55²x5-45²x5
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.
求和(1)(a-1)+(a²-2)+…+(an-n)(2)(2-3X5^-1)+(4-3X5^-2)+…+(2
(1.25)x5分之2-2³÷﹙-1又3分之1﹚²
[(2/3-1/4)÷5/6+4/5]X5/11
lim 2x³+3x²+5/7x³+4x²-1 的极限 ,lim e x5-1/
(7\8-1\5)x5\6=
用简便方法计算!2/7x5/9x(36x28) 7/9÷13/5+2/9x5/13(5/6-7/12x15/14)÷5/
求二项式(x²-x分之1)10次方展开式中含x5次方的项
[1又2分之3减(1/3-1/6+5/12)x2.4]x5
求前n项和1.1/(2X5),1/(5X8),1/(8X11)...2.2^2/(1X3),4^2/(3X5),6^2/
递等式计算,能简算的要简算.(1)0.89X10.1,(2)4.56X5.6+5.6X5.44,(3)92.8÷8÷1.