MAT2611 ASSIGNMENT 10 2025
Problem 1
𝑇1 (𝑥, 𝑦) = (4𝑥, 𝑥 − 𝑦, 2𝑥 − 𝑦)
𝑇2 (𝑥, 𝑦, 𝑧) = (−𝑥, 0, 𝑥 + 2𝑦 + 𝑧)
𝑇3 (𝑥, 𝑦, 𝑧) = (2𝑥 + 𝑦 − 𝑧, 2𝑦 + 3𝑧)
(𝑇3 ∘ 𝑇2 ∘ 𝑇1 )(𝑥, 𝑦)
= 𝑇3 (𝑇2 (𝑇1 (𝑥, 𝑦)))
= 𝑇3 (𝑇2 (4𝑥, 𝑥 − 𝑦, 2𝑥 − 𝑦) )
= 𝑇3 ( −4𝑥, 0, 4𝑥 + 2(𝑥 − 𝑦) + (2𝑥 − 𝑦))
= 𝑇3 ( −4𝑥, 0, 4𝑥 + 2𝑥 − 2𝑦 + 2𝑥 − 𝑦)
= 𝑇3 ( −4𝑥, 0, 8𝑥 − 3𝑦)
= (2 (−4𝑥 ) + 0 − (8𝑥 − 3𝑦) , 2(0) + 3(8𝑥 − 3𝑦) )
= ( −8𝑥 − 8𝑥 + 3𝑦, 24𝑥 − 9𝑦)
= ( −16𝑥 + 3𝑦, 24𝑥 − 9𝑦)
Problem 1
𝑇1 (𝑥, 𝑦) = (4𝑥, 𝑥 − 𝑦, 2𝑥 − 𝑦)
𝑇2 (𝑥, 𝑦, 𝑧) = (−𝑥, 0, 𝑥 + 2𝑦 + 𝑧)
𝑇3 (𝑥, 𝑦, 𝑧) = (2𝑥 + 𝑦 − 𝑧, 2𝑦 + 3𝑧)
(𝑇3 ∘ 𝑇2 ∘ 𝑇1 )(𝑥, 𝑦)
= 𝑇3 (𝑇2 (𝑇1 (𝑥, 𝑦)))
= 𝑇3 (𝑇2 (4𝑥, 𝑥 − 𝑦, 2𝑥 − 𝑦) )
= 𝑇3 ( −4𝑥, 0, 4𝑥 + 2(𝑥 − 𝑦) + (2𝑥 − 𝑦))
= 𝑇3 ( −4𝑥, 0, 4𝑥 + 2𝑥 − 2𝑦 + 2𝑥 − 𝑦)
= 𝑇3 ( −4𝑥, 0, 8𝑥 − 3𝑦)
= (2 (−4𝑥 ) + 0 − (8𝑥 − 3𝑦) , 2(0) + 3(8𝑥 − 3𝑦) )
= ( −8𝑥 − 8𝑥 + 3𝑦, 24𝑥 − 9𝑦)
= ( −16𝑥 + 3𝑦, 24𝑥 − 9𝑦)