Câu trả lời:
NOTE
The students are not posted to questions not related to Mathematics, or miscellaneous problem jamming forum (**** 1 + 1 =?). Online Math may apply such measures as minus points, even permanently lock your account if you violate the rules multiple times.
Forum Help me solve problems for people you encounter a difficult problem or have problems or want to share. Therefore the students should pay attention not posting miscellaneous, not with acts of fraud inquiry points to create questions and then choose the correct answer themselves.
Each member is sent a maximum of 5 questions in 1 day !