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A440
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Homework Statement
Is T(X,Y)->(X,Y,1) a linear transformation? where X and Y are defined R2 column vectors.
Homework Equations
Attempt to prove T(cX+Y)=cT(X)+T(Y)
Consider T(cx1+y1,cx2+y2)->(cx1+y1,cx2+y2,1)
The Attempt at a Solution
RS=cT(x1,y1)+T(x2,y2)->c(x1,y1,1)+(x2,y2,1)
=(cx1+y1,cx2+y2,1)+(0,0,c)
=(cx1+y1,cx2+y2,1)+c(0,0,1)
The 'zero' vector: T(0,0)->(0,0,1)
therefore T(cx1+y1,cx2+y2)->(cx1+y1,cx2+y2,1)
and T(X,Y)->(X,Y,1) is a linear transformation.
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