REPLY TO INVITATION
Dear [Name],
I am pleased to accept the invitation to attend the school’s annual day, where my child will be performing in the play. We look forward to being part of this wonderful event and celebrating the hard work of the students.
Best regards,
Shreya Rao
Find the interval in which $f(x) = x + \frac{1}{x}$ is always increasing, $x \neq 0$.