Question

Tính:

A = 33 \(\left(1-\dfrac{2}{3}\right)\left(1-\dfrac{2}{5}\right)\left(1-\dfrac{2}{7}\right)...\left(1-\dfrac{2}{99}\right)\)

*Làm gấp nha

Mai mk thi rồi

Answer 1

A= 33.(\(\dfrac{1}{3}.\dfrac{3}{5}.\dfrac{5}{7}.....\dfrac{97}{99}\))

A=33.\(\left(\dfrac{1.3.5.....97}{3.5.7.....99}\right)=33.\dfrac{1}{99}=\dfrac{33.1}{99}=\dfrac{33}{99}=\dfrac{1}{3}\)

Vậy A = \(\dfrac{1}{3}\)

Answer 2

chuc thi tot

Answer 3

minh cung dang vua thi xong toan , anh con van va sinh