InterviewSolution
Saved Bookmarks
| 1. |
यदि `x=1+sqrt(2)+sqrt(3)` और `y=1+sqrt(2)-sqrt(3)` तो `(x^(2)+4xy+y^(2))/(x+y)` का मान क्या होगा?A. `2sqrt(2)`B. `2(2+sqrt(2))`C. `1`D. `6` |
|
Answer» Correct Answer - D According to the question `x=1+sqrt(2)+sqrt(3)`………….i `y=1+sqrt(2)-sqrt(3)`……………..ii `implies (x^(2)+4xy+y^(2))/(x+y)` `implies((x+y)^(2)+2xy)/(x+y)` From equation i + ii `x+y=2+2sqrt(2)` `xy=(1+sqrt(2))^(2)-(sqrt(3))^(2)` `=3+2sqrt(2)-3` `=2sqrt(2)` `implies ((2+2sqrt(2))^(2)+4sqrt(2))/(2+2sqrt(2))` `implies (4+8+8sqrt(2)+4sqrt(2))/(2+2sqrt(2))` `implies (12+12sqrt(2))/(2+2sqrt(2))` `=(12(1+sqrt(2)))/(2(1+sqrt(2)))=6` |
|