What is the sum of 6 + 2i and 5 - 7ia.) 11 + 9ib.) 1 + 5ic.) 1 - 5id.) 11 - 5i

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answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb