已知1×1/3等于1/2乘1-1/3
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a99=(a+1)/a*(a+2)=(1+99)/99*(99+2)=100/99*101=100/9999
等于括号100乘99加99乘98.加2乘1反括号乘3
等于30414093201713378043612608166064768844377641568960512000000000000
4673!再答:655543633
这叫100的阶乘,表示为100!.100!=933262154439441526816992388562667004907159682643816214685929638952175999932299
an=[n*(n+2)+1]/[n*(n+1)*(n+2)]
五分之六六分之五五分之六
N!分之N减一!等于几=(1/n)
x乘(x+1)乘(x+2)乘(x+3)等于360x(x+1)(x+2)(x+3)=360x(x+3)(x+1)(x+2)=360(x²+3x)(x²+3x+2)=360令y=x&s
5/12×12/5=2/7×7/2=26×1/26=1/3×3=1
等于.r.8
"3.04140932017134E+64"
9!=8!x9=40320x9=36288010!=9!x10=362880x10=3628800
用手指头算啊.笨.
等于30414093201713378043612608166064768844377641568960512000000000000
98!分之100!=100×99=9900
第一个空(5/2)第2个空(4)
(10000!)^2
1x2x3x4x5x6x7x8x9x10x11x12x13x14x15x16x17x18x19x20x21x22x23x24x25x26x27x28x29x30x31x32x33x34x35x36x3