Question

1/1*2+1/2*3+1/3*4+1/9*4​

Answer 1

Answer:

7/9

Step-by-step explanation:

=1/2 + 1/6 + 1/12 + 1/36

Taking lcm

=18/36 + 6/36 + 3/36 + 1/36

= 28/36

= 7/9