因为60=3x4x5,所以3、4、5都是60的质因数.是对是错

因为60=3x4x5,所以3、4、5都是60的质因数.是对是错 若2!=2x3,=3x4x5,=5x6x7x8x9 ,那么4!/5! 若2!=2x3,=3x4x5,=5x6x7x8x9 ,那么4!/6! 因为60=4*3*5,所以3,4,5都是60的质因数对吗 因为60=3?,所以3、4、5都是60的质因数. 若2!=2x3,3!=3x4x5,5!=5x6x7x8x9,按此规则计算4!/6!. 若2!=2x3,=3x4x5,=5x6x7x8x9,按此规则计算4!/6!. 1/1x2x3+1/2x3x4+1/3x4x5+1/4x5x6+1/5x6x7=?这类题 因为60=3×4×5,所以3,4,5,都是60的质因数 对还是错! 请1/1x2x3+1/2x3x4+1/3x4x5+1/4x5x6= 1x2x3+2x3x4+3x4x5+4x5x6+...+n(n+1)(n+2)= 2/1x2x3+2/2x3x4+2/3x4x5+2/4x5x6+...+2/98x99x100= 1x2x3+2x3x4+3x4x5+...+7x8x9=, 1x2X3+2x3X4+3x4X5+…+7X8X9=? 1x2x3=6 3x4x5=60 5x6x7=210 2x3x4=24 4x5x6=120三个连续自然数(0除外）的乘积一定是哪个数的倍数为什么 1/2x3x4+1/3x4x5+1/4x5x6+……+1/48x49x50=x是乘号!过程.答案. 1/1x2x3+1/2x3x4+1/3x4x5+------+1/98x99x100= 1/(1x2x3)+1/(2x3x4)+1/(3x4x5)+.1/(20x21x22)=?