[qquad sum_(S){sum_(S)|B|leqslant S|],[" Which of the following are not rational numbers? "],[(1)/(7)" (ii) "-3]

Which of the following number(s) is/are rational ?

Which of the following number(s) is/are rational?

Which of the following number (s) is/are rational?

Which one of the following number (s) is/are rational?

Which of the following rational numbers lie(s) between -1 and -2?

The sum of two rational numbers is a rational number.

Let S be a non-empty subset of R. Consider the following statement: P: There is a rational number x in S such that x"">""0 . Which of the following statements is the negation of the statement P ? There is no rational number x in S such that xlt=0 (9) Every rational number x in S satisfies xlt=0 (18) x in S and xlt=0=>x (27) is not rational There is a rational number x in S such that xlt=0 (36)

Let S_(n) denote the sum of the cubes of the first n natural numbers and s_(n) denote the sum of the first n natural numbers.Then sum_(r=1)^(n)(S_(r))/(s_(r)) is equal to