Question
Which one of the following is true ?
A.
$${\left( {1 + \frac{1}{n}} \right)^n} < {n^2},n$$ is a positive integer
B.
$${\left( {1 + \frac{1}{n}} \right)^n} < {2},n$$ is a positive integer
C.
$${\left( {1 + \frac{1}{n}} \right)^n} < {n^3},n$$ is a positive integer
D.
$${\left( {1 + \frac{1}{n}} \right)^n} > {2},n$$ is a positive integer
Answer :
$${\left( {1 + \frac{1}{n}} \right)^n} > {2},n$$ is a positive integer
Solution :
$${\text{Put, }}n = 1,{\left( {1 + \frac{1}{1}} \right)^1} = 2$$
$$\therefore {\left( {1 + \frac{1}{n}} \right)^n} > {2},n$$ is a positive integer.