Question

ai giải đc khum

Answer 1

c

Answer 2

\(\left(1+\dfrac{1}{1}\right).\left(1+\dfrac{1}{2}\right).\left(1+\dfrac{1}{3}\right).\left(1+\dfrac{1}{4}\right).\left(1+\dfrac{1}{5}\right).\left(1+\dfrac{1}{6}\right)\)

=\(\dfrac{2}{1}.\dfrac{3}{2}.\dfrac{4}{3}.\dfrac{5}{4}.\dfrac{6}{5}.\dfrac{7}{6}=7\)

- Chọn câu D :)