InterviewSolution
Saved Bookmarks
| 1. |
whichof the following is//aretrue for Delta= |{:(a^(2),,1,,a+c),(0,,b^(2)+1,,b+c),(0,,b+c,,c^(2)+1):}| ? |
|
Answer» `Delta ge 0` for realvaluesof a,b,c `=|{:(a,,0,,1),(0,,b,,1),(0,,1,,c):}|^(2)` `=(abc -a)^(2)= a^(2) (bc-1)^(2)` `=|{:(bc-1,,0,,0),(1,,ac,,-a),(-b,,-a,,ab):}|` {Determinant formed bycofactors) |
|