计算:(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)…(1-1/49²)(1-1/50²)
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计算:(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)…(1-1/49²)(1-1/50²)
计算:(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)…(1-1/49²)(1-1/50²)
计算:(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)…(1-1/49²)(1-1/50²)
:(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)…(1-1/49²)(1-1/50²)
连续用平方差公式
=(1-1/2)(1+1/2)(1-1/3)(1+1/3)……(1-1/50)(1+1/50)
=1/2×3/2×2/3×4/3×……×49/50×51/50
=1/2×51/50
=51/100