Saved Bookmarks
| 1. |
If `f: N to N, and x_(2) gt x_(1) implies f(x_(2)) gt f(x) AA x_(1), x_(2) in N and f(f(n))=3n AA n in N," then " f(2)=` _______. |
|
Answer» Correct Answer - 3 `f(3n)=f(f(f(n))) = 3f(n) AA n in N` Putting `n=1, f(3)=3f(1)` If `f(f(1))=3 " giving " 1=3` which is absurd. Therefore, `f(1) ne 1.` Thus, `3=f(f(1)) gt f(1) gt 1` So, `f(1)=2` `f(2)=f(f(1)=3` |
|