InterviewSolution
Saved Bookmarks
| 1. |
If a + 1/(a + 7) = (-5); find the value of (a + 7)11 + 1/(a + 7)12?1. 42. 13. 04. 2 |
|
Answer» Correct Answer - Option 4 : 2 Given: [a + 1/(a + 7)] = (-5) Concept: If the value of the equation x + (1/x) is given as 2, then the value of x = 1. Calculation: ∵ [a + 1/(a + 7)] = (-5) Adding (7) on both sides; ⇒ [(a + 7) + 1/(a + 7)] = (-5) + 7 ⇒ [(a + 7) + 1/(a + 7)] = 2 Now, this is in the form ‘x + (1/x) = 2’ ∴ a + 7 = 1 ⇒ [(a + 7)11 + 1/(a + 7)12] = (1)11 + 1/(1)12 = 1 + 1 = 2 |
|