Question

16. Find the sum of n terms of A.P.
x-1/x,1,x+1/x,......​

Answer 1

Answer:

(2nx-3n+n^2)/2x

Step-by-step explanation:

Sum of n terms = n/2[2a+(n-1)d]

a=x-1/x; d= 1-[(x-1)/x] = 1/x; n is the term;

Sum of n terms = n/2[2*x-1/x+(n-1)*1/x]

=n/2[2x-2/x+n-1/x]

=n/2[2x-2+n-1/x]

=2nx-3n+n^2/2x