InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
The range of function `f(x)=^(7-x)P_(x-3)i s`{1,2,3}(b) `{1,2,3,4,5,6}``{1,2,3,4}`(d) `{1,2,3,4,5}`A. `{1,2,3}`B. `{1,2,3,4,5,6}`C. `{1,2,3,4}`D. `{1,2,3,4,5}` |
|
Answer» Correct Answer - A We have `f(x)=""^(7-x)P_(x-3)=((7-x)!)/((10-2x)!)` We must have `7-x gt 0, x ge 3, " and " 7-x ge x-3.` Therefore, `x lt 7, x ge 3, " and " x le 5` or ` 3 le x le 5` or ` x =3,4,5` Now, `f(3)=(4!)/(4!)=1, f(4)=(3!)/(2!)=3,f(5)=(2!)/(0!)=2.` Hence, `R_(f)={1,2,3}.` |
|