Given an example of a statement `P(n)` which is true for all `ngeq4` but `P(1),\ P(2)a n d\ P(3)` are not true. Justify your answer.

Explanation

Consider the statement
`P(n):3n
For `n=1, 3×1<1!`, Which is not true

For `n=2, 3×2<2!`, Which is not true

For `n=3, 3×3<3!`, Which is not true

For `n=4, 3×4<4!`, Which is true

For `n=5, 3×5<5!`, Which is true