Let `x_(1),x_(2),x_(3), . . .,x_(k)` be the divisors of positive integer 'n' (including 1 and x). If `x_(1)+x_(2)+ . . .+x_(k)=75`, then `sum_(r=1)^(k)(1)/(x_(i))` is equal to

Let x_(1),x_(2),x_(3), . . .,x_(k) be the divisors of positive integer ' n ' (including 1 and x ). If x_(1)+x_(2)+ . . .+x_(k)=75 , then sum_(i=1)^(k)(1)/(x_(i)) is equal to:

Let x_(1),x_(2),x_(3), . . .,x_(k) be the divisors of positive integer ' n ' (including 1 and x ). If x_(1)+x_(2)+ . . .+x_(k)=75 , then sum_(i=1)^(k)(1)/(x_(i)) is equal to:

Let x_1 , x_2 , x_3,....., x_k be the divisors of positive integer n (including 1 and n). If x_1 + x_2 + x_3 + ...... + x_k = 75 Then sum_(i=1)^k (1/x_i) is equal to (A) 75/k (B)75/n (C) 1/n (D)1/75

Let x_1 , x_2 , x_3,....., x_k be the divisors of positive integer n (including 1 and n). If x_1 + x_2 + x_3 + ...... + x_k = 75 Then sum_(i=1)^k (1/x_i) is equal to (A) 75/k (B) 75/n (C) 1/n (D) 1/75

Let x_1 , x_2 , x_3,....., x_k be the divisors of positive integer n (including 1 and n). If x_1 + x_2 + x_3 + ...... + x_k = 75 Then sum_(i=1)^k (1/x_i) is equal to (A) 75/k (B) 75/n (C) 1/n (D) 1/75

Let x_1 , x_2 , x_3,....., x_k be the divisors of positive integer n (including 1 and n). If x_1 + x_2 + x_3 + ...... + x_k = 75 Then sum_(i=1)^k (1/x_i) equal to (A) 75/k (B) 75/n (C) 1/n (D) 1/75

If x_(1),x_(2),x_(3),......x2_(n) are in A.P, then sum_(r=1)^(2n)(-1)^(r+1)x_(r)^(2) is equal to

Assertion (A) : The number of positive integral solutions of x_(1)+x_(2)+x_(3)=10 is 36. Reason (R) : The number positive integral solutions of the equation x_(1)+x_(2)+x_(3)+.......+x_(k)=n is ""^(n-1)C_(k-1) , The correct answer is