CAT Question of the Day The real function f(x) satisfies the equation f(x) f(y) = f(x + y) + xy for all real numbers x and y. What is the value of f(0)?
| OPTIONS | | |  | 1) | −1 | | | 2) | 0 | | | 3) | 1 | | | 4) | 2 | | | 5) | Cannot be uniquely determined |
Tip of the Day Sometimes in Data Sufficiency questions, if you see "two equations - two variables" case, do not conclude that the data is sufficient. We have to make sure that the two equations are neither same nor do they form an inconsistent system of equations. Last year's Question of the day (12-May-11) How many 5-letter words can be formed using As, Bs, Cs and Ds only, which do not contain the word BAD?
| OPTIONS | | | | | 1) | 960 | | | 2) | 976 | | | 3) | 1024 | | | 4) | 1000 | | | 5) | None of these |
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