Tính A = \(\frac{1}{2} \cdot \left(-\frac{1}{2}\right) \cdot \left(\frac{1}{3}\right) \cdot \left(-\frac{1}{4}\right) \cdot \left(\frac{1}{5}\right) \cdot \left(-\frac{1}{6}\right) \cdots \left(-\frac{1}{100}\right)\)

----- Nội dung ảnh -----
Tính A = \(\frac{1}{2} \cdot \left(-\frac{1}{2}\right) \cdot \left(\frac{1}{3}\right) \cdot \left(-\frac{1}{4}\right) \cdot \left(\frac{1}{5}\right) \cdot \left(-\frac{1}{6}\right) \cdots \left(-\frac{1}{100}\right)\).