Question 371053
Yes, T is an ONTO transformation,
{{{f((matrix(4,1,x,y,z,t))) = (matrix(4,4,0,0,0,1,0,0,1,0,1,3,0,0,1,1,0,0))*(matrix(4,1,x,y,z,t))  = (matrix(4,1,t,z,x+3y,x+y)) }}}