Question

find the seventh rational number between 1/3 and 1/2​

Answer 1

7 rational number between 1/3 and 1/2

let X = 1/3 and y = 1/2 X<y , n= 7 ( n is the numbers of rational. you have to find )

then, d = y-n/n+1 => 1/2-1/3/7+1 = 1/48

d = 1/48 , X = 1/3 and y = 1/2

so, the seven rational numbers between 1/3 and 1/2 is (X+d) , (X+2d),(X+3d),(X+4d),(X+5d),(X+6d),(X+7d)

put the value you will get the solution.

and also there are infinite rational numbers between any 2 numbers.

you can find these from other methods also.

my recommendations is solve class 9 R.S aggarwal chapter number 1 .