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Transformationshard
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A point (x,y)(x, y)(x,y) undergoes a shear transformation T(x,y)=(x+ky,y)T(x, y) = (x + ky, y)T(x,y)=(x+ky,y). If the line segment connecting (0,0)(0, 0)(0,0) and (1,1)(1, 1)(1,1) is transformed into a segment of length k2+2k+2\sqrt{k^2 + 2k + 2}k2+2k+2​, what must be true about kkk?