C=\(\frac{1}{3}+\frac{1}{3^2}+...+\frac{1}{3^{99}}< -\frac{1}{2}\)

D=\(\left(\frac{1}{2^2}-1\right).\left(\frac{1}{3^2}-1\right).\left(\frac{1}{4^2}-1\right)...\left(\frac{1}{100^2}-1\right)< -\frac{1}{2}\)

Read the email from your friend, Olivia. Write an email to give her advice on her health problems. Write 25-35 words.

Ex: Dear_______,

I don't think I can go to the movies tonight. I feel sick. Last night, I went to bed too late. I have a headache and a cold this morning. I'm sorry and hope you have a great time tonight.

Love,

Olivia