 
                 
                InterviewSolution
 Saved Bookmarks
    				| 1. | 3.(n + 3)P4 = 5.(n + 2)P4 हो, तो n का मूल्य ज्ञात करो । | 
| Answer» 3.(n + 3) (n + 3 – 1) (n + 3 – 2) (n + 3 – 3) = 5 (n + 2) (n + 2 – 1) (n + 2 – 2) (n + 2 – 3) ∴ 3 (n + 3) (n + 2) (n + 1) (n) = 5 (n + 2) (n + 1) (n) (n – 1) ∴ 3 (n + 3) = 5 (n – 1) (दो ओर समान मूल्य कट जायेंगे ) 3n + 9 = 5n – 5 | ∴ 5n – 3n = 9 + 5 2n = 14 ∴ n = \(\frac{14}2\) n = 7 | |