(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,
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(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,(1+1/1x3)x(1+1/2x4)x```x
(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,
(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,
(1+1/1x3)x(1+1/2x4)x```x(1+1/9x11)是多少,
(1+1/1×3)×(1+1/2×4)x(1+1/3×5)×......×(1+1/98×100)×(1+1/99×101)
=(1×3+1/1×3)×(2x4+1/2x4)×(3x5+1/3x5) × (4x6+1/4x6)×…… ×(98x100+1/98x100)×(99x101+1/99x101)
=4×9×16×25×……×9801×10000/1×2×3×4×5……×9...
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(1+1/1×3)×(1+1/2×4)x(1+1/3×5)×......×(1+1/98×100)×(1+1/99×101)
=(1×3+1/1×3)×(2x4+1/2x4)×(3x5+1/3x5) × (4x6+1/4x6)×…… ×(98x100+1/98x100)×(99x101+1/99x101)
=4×9×16×25×……×9801×10000/1×2×3×4×5……×99×100×101
=2²X3²X4²X.....X100²/1X2X3X4X.......X100X101
=2X3X4X5X...........X100/101
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