If `c` is very small when compared to `k` then `(k/(k+c))^(1/2)+(k/(k-c))^(1/2)=`

If x is very small in magnitude compared with a such that ((a)/(a+ x))^(1//2) + ((a)/(a-x))^(1//2) = 2 + k (x^(2))/(a^(2)) , then the value of k, is

If x is very small in magnitude compared with a such that ((a)/(a+ x))^(1//2) + ((a)/(a-x))^(1//2) = 2 + k (x^(2))/(a^(2)) , then the value of k, is

If sec theta+tan theta=k,cos theta=(k^(2)+1)/(2k)b(2k)/(k^(2)+1)c*(k)/(k^(2)+1)d*(k)/(k^(2)-1)

If s e ctheta+t a ntheta=k ,\ costheta= a. (k^2+1)/(2k) b. (2k)/(k^2+1) c. k/(k^2+1) d. k/(k^2-1)

Find the value of k if ^(k^2-2k)C_9 = ^(k^2-2k)C_6