求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos(x/2∧n))

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求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos(x/2∧n))
求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos
求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos(x/2∧n))

求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos求极限 lim(x→0)(lim(n_∞)cos(x/2)cos(x/2²)...cos(x/2∧n))
1 对原式乘sin(x/2^n) 下面除以这个 得到了 sinx/((2^n)*sin(X/2^n)) 代入极限为一