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Problem 6. (10 points; 2 points for each subquestion) Let f(x) = x + - Answer the following questions. (1) Find the domain anPlease write out all the steps clearly so that I can understand. Thanks.

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10 • fox) = xto (2) (i) Domain → Rodo? I lü) ys atte ay = x² + 4 x - xy +4=0 For real roots, (64) 2 - 4 > 0 42-4210 (y + 2) (3 fOUE 1-452 for increasing f(x) so Ime so (+7 )(x - 1) 0 с XE (-2,0)|(2,00) for decreasing XE (-2,-2) (0, 2) NOTES f (a)= -

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