几个奥数题目,麻烦高手帮忙解答,急用,谢谢.几个奥数题目,麻烦解答一下,谢谢(1)1/2+3/4+4/8+5/16+.1/2个10次方(2) (2-2/3)×(3-3/4) ×(4-4/5) ×(5-5/6) ×(6-6/7) ×(7-7/8) ×(8-8/9)(3)(1/8+1/24+1/48+1/80+1/120+1/168+1/11
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![几个奥数题目,麻烦高手帮忙解答,急用,谢谢.几个奥数题目,麻烦解答一下,谢谢(1)1/2+3/4+4/8+5/16+.1/2个10次方(2) (2-2/3)×(3-3/4) ×(4-4/5) ×(5-5/6) ×(6-6/7) ×(7-7/8) ×(8-8/9)(3)(1/8+1/24+1/48+1/80+1/120+1/168+1/11](/uploads/image/z/5206864-40-4.jpg?t=%E5%87%A0%E4%B8%AA%E5%A5%A5%E6%95%B0%E9%A2%98%E7%9B%AE%2C%E9%BA%BB%E7%83%A6%E9%AB%98%E6%89%8B%E5%B8%AE%E5%BF%99%E8%A7%A3%E7%AD%94%2C%E6%80%A5%E7%94%A8%2C%E8%B0%A2%E8%B0%A2.%E5%87%A0%E4%B8%AA%E5%A5%A5%E6%95%B0%E9%A2%98%E7%9B%AE%2C%E9%BA%BB%E7%83%A6%E8%A7%A3%E7%AD%94%E4%B8%80%E4%B8%8B%2C%E8%B0%A2%E8%B0%A2%EF%BC%881%EF%BC%891%2F2%2B3%2F4%2B4%2F8%2B5%2F16%2B.1%2F2%E4%B8%AA10%E6%AC%A1%E6%96%B9%282%29+%282-2%2F3%29%C3%97%283-3%2F4%29+%C3%97%284-4%2F5%29+%C3%97%285-5%2F6%29+%C3%97%286-6%2F7%29+%C3%97%287-7%2F8%29+%C3%97%288-8%2F9%29%283%29%281%2F8%2B1%2F24%2B1%2F48%2B1%2F80%2B1%2F120%2B1%2F168%2B1%2F11)
几个奥数题目,麻烦高手帮忙解答,急用,谢谢.几个奥数题目,麻烦解答一下,谢谢(1)1/2+3/4+4/8+5/16+.1/2个10次方(2) (2-2/3)×(3-3/4) ×(4-4/5) ×(5-5/6) ×(6-6/7) ×(7-7/8) ×(8-8/9)(3)(1/8+1/24+1/48+1/80+1/120+1/168+1/11
几个奥数题目,麻烦高手帮忙解答,急用,谢谢.
几个奥数题目,麻烦解答一下,谢谢
(1)1/2+3/4+4/8+5/16+.1/2个10次方
(2) (2-2/3)×(3-3/4) ×(4-4/5) ×(5-5/6) ×(6-6/7) ×(7-7/8) ×(8-8/9)
(3)(1/8+1/24+1/48+1/80+1/120+1/168+1/114) ×64
(4)1+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42
几个奥数题目,麻烦高手帮忙解答,急用,谢谢.几个奥数题目,麻烦解答一下,谢谢(1)1/2+3/4+4/8+5/16+.1/2个10次方(2) (2-2/3)×(3-3/4) ×(4-4/5) ×(5-5/6) ×(6-6/7) ×(7-7/8) ×(8-8/9)(3)(1/8+1/24+1/48+1/80+1/120+1/168+1/11
1.原式=(2-3/2)+(3/2-4/4)+...+(11/2^9-12/2^10)=2-12/2014=509/256
2.原式=(4/3)(9/4)...(64/9)=(2^2/3)(3^2/4)...(8^2/9)=4x3x4x5x6x7x8x(1/9)=8960
3.原式=((1/2x4)+(1/4x8)+...+(1/14x16))x64=(1/2-1/4+1/4-1/6+...+1/14-1/16)x64÷2=(7/16)x32=14 您把224打成114了.
4.原式=(1+3+5+7+9+11)+((1/2x3)+(1/3x4)+...+(1/6x7)=36+((1/2)-(1/7))=36又5/14
第一个题中写出通项公式后再用错位相减即可,注意首项的不同1/2写成1后结果再减1
6666666666
第一道题没看明白
2、N-N/(N+1)=n²/(n+1)
2²/3×3²/4×4²/5×……8²/9=(2²×3×4×……8)÷9=2³×4×5×7×8=8960
3、好像1/114有点问题
4、=1+3+5+7+9+11+1/6+1/12+1/20+1/30+1/42