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I say the answer is A.
topsquark said:Did you check it? Did the roots come out? (They don't.)
There are three ways to do this one.
1) Cheat and find the roots of all your possible answers.
2) Use the Vieta formulas.
3) Write out \(\displaystyle (x - 1) \left ( x - \dfrac{1}{ \alpha } \right ) = 0\) and expand.
-Dan
Translation: I don't know man. That sounds like a lot of work!mathland said:No. I did not check it. What is the Vieta formulas?
mathland said:No. I did not check it. What is the Vieta formulas?
Theia said:Vieta's formulas are equations that connect some expressions of the roots of a polynomial equation to its coefficients. (See e.g. wikipedia)