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Consider T(x,y) = (2x-y, -4x+2y), is T invertible? Why or why not? If so, compute the inverse, T-1, and compute the image of 8 under

Consider T(x,y) = (2x-y, -4x+2y), is T invertible? Why or why not? If so, compute the inverse, T-1, and compute the image of 8 under the inverse map. ie. Compute T^-1

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