Question

1/997*998+1/998*999+1/999=

Answer 1

1/997*998+1/998*999+1/999

=1/995006+1/997002+1/999

=2/996003+1/999

Tk mình nha

Answer 2

=2,003006014

Answer 3

Kết quả bằng 500/497503

Answer 4

ai trình bày đúng mk tk cho

Answer 5

\(\frac{1}{997\cdot998}\)+\(\frac{1}{998\cdot999}\)+ \(\frac{1}{999}\)= \(\frac{998-997}{997\cdot998}\)+\(\frac{999-998}{998\cdot999}\)+ \(\frac{1}{999}\)= \(\frac{1}{997}\)- \(\frac{1}{998}\)+ \(\frac{1}{998}\)-\(\frac{1}{999}\)+ \(\frac{1}{999}\)= \(\frac{1}{997}\)