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Ta có: C= \(\frac{3^{99}}{3^{100}}\)+\(\frac{3^{98}}{3^{100}}\)+...+\(\frac{1}{3^{100}}\)
=\(\frac{3^{99}+3^{98}+...+3+1}{3^{100}}\)
=\(\frac{1+3+3^2+...+3^{99}}{3^{100}}\)
=\(\frac{3^{100}-1}{3^{100}}\)
=1
5) she hasn't kissed me for 5 month
6) we haven't met each other for a long time
7) how long have you had it?
8) I haven't had a delicious meal like that
5. she hasn't kissed me for 5 year
6.we haven't met for a long time
7.
8.i haven't had such a delicious meal before.
1. I prefer English class to Math class.
2. I prefer playing drums to playing piano.
3. I prefer online travel agencies to regular travel agencies.
4. I prefer summers to winters.
5. Kim prefer cats to dogs.
Write one more sentence : I prefer going out to staying at home.
1. he was not experienced enough to do the job.
2. she is not old enough to ride a motorbike
3.The boy is not old enough to understand it
4.Your pocket is not big enough to put this book in
5.The weather is not warm enough for us to go swimming.
6. I am lucky enough to have many friends
7.This exercies is not easy enough for me to do
8.He is not old enough to drive a car
9. The book is interesting enough for me to read it twice
10. The water is not warm enough for you to go swimming today
Tìm x mà là toán hả bạn????
Bài khó nhỉ nhưng tìm x cx là toán mà