Consider the function below. fx, Y) = /2 + x - y? (a) Find the domain of f. O x - y?1 2 0 oy? 2x Ox2 y? - 2 ox+22 vỹ ox2 y? (b) Find the range of f. (Enter your answer using interval notation.)

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Q: Prove (kindly provide reason/s) that for any real numbers m and n, (-m) + (-n) = - (m + n)

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