(1/2+2/3)X5/6怎样计算
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.
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.
运用运算定律计算24X(1/4+1/6-1/3) 8.5X4.2+8.5X5.8 7.5÷0.125÷8
简便计算1/2+1/2x3+1/3x4+1/4x5+...+1/99x100
计算1/1X3+1/2X4+1/3X5+.+1/10X12
计算1x2+2x3+3x4+4x5+...+99x100
一道简便计算数学题1X2+2X3+3X4+4X5...+n(n+1)一1X2+2X3+3X4+4X5...+2013X2
sn=(2-3x5^-1)+(4-3x5^-2)+…+(2n-3x5^-n)要详解答案,急用!
[(2/3-1/4)÷5/6+4/5]X5/11
先阅读再计算2/1x3=1-1/32/3x5=1/3-1/52/5x7=1/5-7=1/7试计算1/1x3+1/3x5+
编写一个程序,计算x-1/2*x3/4+1/2*3/4*x5/6-1/2*3/4*5/6*x7/8+.的近似值
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.