## Answers

@ Pex, 41 = 4x+42 @ f Cut Dx, 4) -f(x4) 400 Duty2 - (4x+42) Dr DK = 40 +40x +42_4X-42 = 40% 4 na Ax = 4 tiky + Ay I-fney - 4x + (4tdy) ² _ (4x+42) Ау = uut y² + 2y. Dy tDy2_40-42 Ay tube 2 29: y. Ay + Ay AY - 2y + Ay gix,y) = x. Jy domain = 30x14) ER? I seriy) = C, CER). If 4 40 then fex,y) is not real number.

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Domain () = 2 (44) E1R² ( x ER, 9703. Range (9) = R (Real numbers)

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