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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: (1/2-1)(1/3-1)(1/4-1)-.(1/99-1)

Toán Lớp 6: (1/2-1)(1/3-1)(1/4-1)…..(1/99-1)

Comments ( 2 )

  1. Giải đáp:
    ($\frac{1}{2}$ – 1)($\frac{1}{3}$ – 1)($\frac{1}{4}$ – 1) … ($\frac{1}{99}$ – 1 )
    = (-$\frac{1}{2}$ )(-$\frac{2}{3}$ )(-$\frac{3}{4}$ ) … ($\frac{-98}{99}$) 
    = $\frac{1.2.3 . …98}{2.3.4….99}$ 
    = $\frac{1}{99}$ 
    #augustango
     

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222-9+11+12:2*14+14 = ? ( )

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