T:R2→R(a) T(a,b)=a+bT((a1,b1)+(a2,b2))=T(a1+a2,b1+b2)=a1+a2+b1+b2=a1+b1+a2+b2=T(a1,b1)+T(a2,b2)
T(α(a,b))=T(αa,αb)=αa+αb=α(a+b)=αT(a,b)
Thus T is linear transformation.
(b)T(a,b)=ab This is not linear transformation
as T(1,1)=1,T(1,0)+T(0,1)=0+0=0⇒T(1,1)=T(1,0)+T(0,1)
(c) T(a,b)=∣a∣bThis is not linear transformation.
T(2,1)=21=2T(2,0)=20=1&T(0,1)=01=0T(2,0)+T(0,1)=1=T(2,1)
(d) T(a,b)=a−b
T(α(a1,b1)+(a2,b2))=T(αa1+a2,αb1+b2)=αa1+a2−αb1−b2=α(a1−b1)+a2−b2=αT(a1,b1)+T(a2,b2)
Thus, T is linear transformation.
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