Rút gọn: B= \(\left(1-\dfrac{1}{2}\right).\left(1-\dfrac{1}{3}\right).\left(1-\dfrac{1}{4}\right)-.\left(1-\dfrac{1}{20}\right)\)
Loga
Toán lớp 6
Rút gọn: B= \(\left(1-\dfrac{1}{2}\right).\left(1-\dfrac{1}{3}\right).\left(1-\dfrac{1}{4}\right)-.\left(1-\dfrac{1}{20}\right)\)
