QUESTION 2 An equation of the normal line to the graph of the equation \( x^{2}-x y+y^{2}=3 \) at the point \( (1,-1) \) is

\( \frac { a } { a x - 1 } + \frac { b } { b x - 1 } = a + b ; x \neq \frac { 1 } { a } , \frac { 1 } { b } \)

a) Chứng minh ab \( / / \mathrm{cd} \) b) Chứng minh \( \mathrm{MN} \perp \) ab c) Tính số đo góc FGK d) Tia phân giác của góc I I. Chứng minh: \( \mathrm{IF} \perp \mathrm{I} \) 3. Cho hình vẽ bên, biết \( C \) đường thẳng yy'. Chứn a) Hai đường thằng xx’ và b) Đường thẳng m vuông c) Cho \( \overline{A B H}=\overline{H A C} \), chứn với đường thẳng AC .

3. \( f(x)=\frac{x}{x+3} \)

ta is an attorney who has been called into action to oversee and supervise government's litigation in a U.S. Supreme Court case. This might very well olve Greta herself conducting an oral argument before the Court. To which he following titles is Greta MOST LIKELY to answer? Assistant U.S. attorney Chief Justice of the Supreme Court Attorney general Solicitor general

On considire les numbres \( a=2400 \) et \( b=1350 \) comporer \( a \) et \( b \) en produit de factears premiers. elculer pged \( (a, b) \) et ppem \( (a, b) \). silier le numbre \( a \) et \( \sqrt{a b} \)