1x2x3x4…x100简便计算的简单介绍

本篇文章给大家谈谈1x2x3x4…x100简便计算，以及对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、1*2*3*4....*100简便运算
• 2、1乘2乘3乘4......乘100等于几
• 3、1X2X3……X100=？ 有什么简便方法吗？

1*2*3*4....*100简便运算

1×2+3×4+5×6+7×8+9×10……纯孝雀+（2n-1）×2n

=4x1^2-2x1+4x2^2-2x2+.....+4n^2-2n

=4(1^2+2^2+...+n^2)-2(1+2+...+n)

=4*n(2n+1)(n+1)/6-n(n+1)

将n=50代入就得做早出了答案慎孝

望采纳

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1乘2乘3乘4......乘100等于几

1x2x3x4x5x6x7x8x9x10x11x12x13x14x15x16x17x18x19x20x21x22x23x24x25x26x27x28x29x30x31x32x33x34x35x36x37x38x39x40x41x42x43x44x45x46x47x48x49x50x51x52x53x4x55x56x57x58x59x60x61x62x63x64x65x66x67x68x69x70x71x72x73x74x75x76x77x78x79x80x81x82x83x84x85x86x87x88x89x90x91x92x93x94x95x96x97x98x99x100

=可以用乘法交换率

=(1x2x3x4x5x6x7x8x9x10)x(11x12x13x14x15x16x17x18x19x20)x(21x22x23x24x25x26x27x28x29x30)x(31x32x33x34x35x36x37x38x39x40)x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97x98x99x100)

数太大了 100!=9.3326215443944152681699238856267e+157

30414093201713378043612608166064768844377641568960512000000000000 一共有24个零 一点错都不会有的

1X2X3……X100=？ 有什么简便方法吗？

=(1x2x3x4x5x6x7x8x9x10)x(11x12x13x14x15x16x17x18x19x20)x(21x22x23x24x25x26x27x28x29x30)x(31x32x33x34x35x36x37x38x39x40)x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97x98x99x100)

=

9.3326215443944 * 10的157次方

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