21. Let T R² T(x1, x₂) T(x) = R2 be a linear transformation such that (x₁ + x2, 4x₁ + 5x2). Find x such that (3, 8).

2 Let T₁: P₂ → R² and T₂: R² → R2x2 be linear transformations defined as follows. Ti (az² + bx + c) = [a+b] ¹([2])-[ (T₂0 T₁) (2x² + 4x + 5) = 5х1 2x1 -9x2 -8x2 [ Ex: 42

(x,y) → (x+5,y) Describe the transformation in words

Letf: R² → R be defined by f((x, y)) = -6x - 8y. Isf a linear transformation? a. f((x₁, y₁) + (x2, y₂)) = b. f(c(x, y)) = f((x₁, y₁)) + f((x₂, y₂)) = + Does f(x,y1) + (x₂, y2)) =f((x₁, y₁)) + f((x2, y2)) for all (x₁, y₁), (x₂, y2) E R²? choose (Enter x₁ as x1, etc.) c(f((x, y))) = Does f(c(x, y)) = c(f((x, y))) for all c ER and all (x, y) E R²? choose c. Isf a linear transformation? choose + + +

Let f: R R be defined by f((x, y)) = 7y - 3x - 3. Is f a linear transformation? a. f((x₁, y₁) + (x₂, y₂)) = etc.) f((x₁, y₁>) + f((x₂, y₂)) = + Does f((x1, y₁) + (x2, Y2 )) = f ((x₁, y₁ )) + f((x2, Y₂ )) for all (x₁, y₁), (x2, Y₂) E R ²? choose b. f (c(x, y)) = c(f((x, y))) = Does f(c(x, y)) = c(f ((x, y))) for all c ER and all (x, y) ER ²? choose c. Is f a linear transformation? choose . (Enter x₁ as x1, <

17. Let T R² R² be a linear transformation that maps [1] [3] 3 Tis linear to find the images under T of 3u, 2v, and 3u + 2v. u= into and maps v = into Use the fact that