If `(k+1/k) =3` then find the value of `(k-1/k)`

Find the value off sum_(k=1)^10(2+3^k)

If A=[(2, 3),(5,-2)] be such that A^(-1)=k\ A , then find the value of k .

if log_kx.log_5k = log_x5 , k!=1 , k>0 , then find the value of x

Evaluate, lim_(x to 1) (x^(4)-1)/(x-1)=lim_(x to k) (x^(3)-k^(3))/(x^(2)-k^(2)) , then find the value of k.

If k, k + 1 and k + 3 are in G.P. then find the value of k.

If A=[[2,4],[-1,k]] and A^2=0 , rhen find the value of k

If A=[[1, 2],[ 4, 2]], then find the value of k if |2A|=k\ |A|

A discrete random variable X has the probability distribution given below: X :\ 0. 5 \ \ 1\ \ 1.5 \ \ 2 P(X):\ \ k \ \ k^2 \ \ 2k^2 \ \ k then, Find the value of k .

Given (1-x^(3))^(n)=sum_(k=0)^(n)a_(k)x^(k)(1-x)^(3n-2k) then the value of 3*a_(k-1)+a_(k) is (a) "^(n)C_(k)*3^(k) (b) "^(n+1)C_(k)*3^(k) (c) "^(n+1)C_(k)*3^(k-1) (d) "^(n)C_(k-1)*3^(k)

If n is a positive integer and C_(k)=""^(n)C_(k) , then the value of sum_(k=1)^(n)k^(3)((C_(k))/(C_(k-1)))^(2) is :