InterviewSolution
Saved Bookmarks
| 1. |
x4 + xy3 + x3y + xz3 + y4 + yz3 is divisible by :(a) (x – y) only (b) (x3 + y3 + z3) only (c) both (x + y) and (x3 + y3 + z3) (d) None of the above |
|
Answer» (b) (x3 + y3 + z3) only Hint. x4 + xy3 + x3y + xz3 + y4 + yz3 = (x4 + xy3 + xz3) + (x3y + y4 + yz3) = x(x3 + y3 + z3) + y(x3 + y3 + z3) = (x + y) (x3 + y3 + z3) |
|