If a = {(x, y)} is a set under a mapping, B = {(2x-y, x + 2Y)}, we know that C = {(a, b)} is a set under F If a = {(x, y)} set B = {(2x-y, x + 2Y)} under the mapping and C = {(a, b)} set D = {(- 1,2)} under f are known, the values of a and B are obtained

If a = {(x, y)} is a set under a mapping, B = {(2x-y, x + 2Y)}, we know that C = {(a, b)} is a set under F If a = {(x, y)} set B = {(2x-y, x + 2Y)} under the mapping and C = {(a, b)} set D = {(- 1,2)} under f are known, the values of a and B are obtained

According to the meaning of the problem, 2a-b = - 1, a + 2B = 2, a = 0, B = 1