Find the value of k if
`k[[1,2],[3,4]]=[[5,10],[15,20]]`

Find the value of k if |(5,2),(k,4)|=6

Find the value off sum_(k1)^10(2+3^k)

Find the value of k if 3^(k+8) = 27^(2k+1)

Find the value of 4k+1 if k=1;k=2,k=-1 and k=(1)/(2)

Find the values of k, if the points A (k+1,2k) ,B (3k,2k+3) and C (5k-1,5k) are collinear.

Find the value of k, if the points A(7,-2),B(5,1) and C(3,2k) are collinear.

The arithmetic mean of the following data is 14. Find the value of k x_i : 5 10 15 20 25 f_i : 7 k 8 4 5

Find the value of k, if (7,-2),(5,1) and(3,k) are collinear.

(i) If the points (1,4),(3,-2)and (k,1)B(3k,2k+3)andC(5k-1,5k) are collinear, fine the value of k. (ii) If the points A(k+1,2k),B(3k,2k+3),B(3k,2k+3)andC(5k-1,5k) are collinear, then show that x + y =2.