Saved Bookmarks
| 1. |
If `(1 + x + x^(2) + x^(3))^(n) = a_(0) + a_(1)x + a_(2)x^(2)+"……….."a_(3n)x^(3n)` then which of following are correctA. `a_(0) + a_(1) + a_(2) +……+a_(3n) = 2^(2n)`B. `a_(0) + a_(2) + a_(4) +"……"= a_(1) + a_(3) + a_(5) +"…….."`C. `a_(0) = a_(3n), a_(1) = a_(3n - 1), a_(2) = a_(3n - 2)`D. `a_(0) + a_(2) + a_(4) + "……." = 2^(2n - 1)` |
|
Answer» Correct Answer - A::B::D Put `x = 1` to get `4^(n) = a_(0) + a_(1) + a_(2) + "………" + a_(3n)"………"` Put `x = -1` to get `rArr a_(0) + a_(2) + a_(4) "…….." = a_(1) + a_(3) + a_(5) "……"` |
|