Question

[dinhkhachoang]

tim tich cua 98 so dau tien cua day

 1\(\frac{1}{3}\) ; 1/1/8;1/1/15 ;........

Answer 1

[dinhkhachoang]

=4/3 ; 9/8;   16/ 15..........;

=2^2/1.3;  3^2/2.4  ;  4^2/3.5 ;.....

so 98 viet  duoi dang 

99^2/98.100

=>2^2/1.3  .  3^2/ 2.4 4^2 / 3.5  ....98^2/97.99  .  99^2/ 99 .100

=>A=99/1   .     2/100 =99/50 

ai k mk mk k lai