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5. Let A =R x R and f: A+ A be given by the rule f(x, y) = (x – y, x + y). (a) Prove f is one-to-one. (b) Prove f is onto A.

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5. A RR A = RX1R and Omd f: A — A defined by - A fined 1. (a) dot, a, b E A st. a = (x1,9.) bo (1214) and fa) = f =) f(x, y)WWWWWWWWWWWWWWWWWWWYN (b) Ler, a element any (PQ) EA , Then we can find (PEL, DE A such that (Ptq , q-P) E A * V. Ptq q-P M 2Feel free to ask any doubt in comment section. Thank you sir/ma'am. ??

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