Make yourself familiar with the alternative notations. What is the simplest way to describe the product of this matrix with a 4-vector v = (x1,x2, x3, w)T = (x", w)" ?

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Write down the 4 by 4 matrix S that scales by a constant c. Multiply ST and also TS, where T is translation by (1, 4, 3). To blow up the picture around the center point (1, 4, 3), would you use vST or vT S?

Describe the solution set, x = X2, of x₁ +4x₂ - 7x3 = -6 in parametric vector form. Select the correct choice X3 below and fill in the answer boxes within your choice. (Type an integer or fraction for each matrix element.) O A. x= OB. X= O C. x= O D. X=X₂ + +X3 +x₂ +X3 +X3