If inverse of A=⎣⎡1211−1−11−11⎦⎤ is 6−1⎣⎡−2−3−1−2020α −3⎦⎤ then α=
A, B, and C are three collinear points. The coordinates of A and B are (3, 4) and (7, 7) respectively and AC =10 units. Find sum of co-ordinates of C.
If a,b,c and u,v,w are the complex numbers representing the vertices of two triangles such that c=(1−r)a+rb and w=(1−r)u+rv, where r is a complex number, then prove that the two triangles are similar.