InterviewSolution
Saved Bookmarks
| 1. |
यदि `x=a+1/a` और `y=a-1/a` है तो `x^(4)+y^(4)2x^(2)y^(2)` का मान ज्ञात करें?A. 214B. 18C. 16D. 12 |
|
Answer» Correct Answer - C `x=a+1/a` `y=a-1/a` `:. (x+y)=a+1/a+a-1/a=2a` `:. (x-y)=a+1/a-a+1/a=2/a` `:.x^(4)+y^(4)-2x^(2)y^(2)-(x^(2)-y^(2))^(2)` `implies ((x+y)(x-y))^(2)` `implies (2a xx 2/a)^(2)` `=(4)^(2)=16` |
|