Let ƒ : R → R³ be defined by f(x) = (x, −9x², 3x). Is ƒ a linear transformation? a. f(x + y) = f(x) + f(y) + Does f(x + y) = f(x) + f(y) for all x, y = R? choose = b. f(cx) = c(f(x)) Does f(cx) = c(f(x)) for all c, x = R? choose = c. Is f a linear transformation? choose

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