P0.2 0.1 40 60 80 100 120 140 160 180 20 7.5 7.6 Time step t Figure 7.2 Plot generated by the m-file EcoSuccession Plot. m. 7.4 Exercises 7.1 Find the values of x and y so that the matrix equalities hold. 1 5 (a) 2x 4-y y 3 3] (b) -4 0 7.7 2 1-5 2 x-3 (c) 9 5 1 3- 9 1 4 7.2 Given the matrix [4 -3 2 0 A=5 -2 0 6 5

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