Tìm các nghiệm nguyên của phương trình :
x2 + 2y2 + 3xy - x - y + 3 = 0
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(x\times\dfrac{5}{7}-3=18\)
\(x\times\dfrac{5}{7}=18+3\)
\(x\times\dfrac{5}{7}=21\)
\(x=21:\dfrac{5}{7}\)
\(x=\dfrac{147}{5}\)
X x 5/7 - 3 = 18
X x 5/7 = 18 + 3
X x 5/7 =21
X =21 : 5/7
X =147/5
2.He doesn't know he boat may take a trip around the island.
3.Phuong, Tuan and Hoa may build sandcastles on the beach.
4.My family and I will swim in the sea.
5.They'll be at the seaside on sunday.
2.He doesn't know he boat may take a trip around the island.
3.Phuong, Tuan and Hoa may build sandcastles on the beach.
4.My family and I will swim in the sea.
5.They'll be at the seaside on sunday.
B = 2100 - 299 + 298 - 297 + ... + 22
B = ( 2100 + 298 + ... + 22 ) - ( 299 + 297 + ... + 23 )
B = ( 2100 + 299 + 298 + 297 + ... + 23 + 22 ) - 2( 299 + 297 + ... + 23 )
B = ( 2100 + 299 + 298 + 297 + ... + 23 + 22 ) - ( 2100 + 298 + ... +
24 )
B = 299 + 297 + ... + 23 + 22
22B = 2101 + 299 + ... + 25 + 24
4B - B = ( 2101 + 299 + ... + 25 + 24 ) - ( 299 + 297 + ... + 23 + 22 )
3B = 2101 + 24 - 23 - 22
3B = 2101 + 16 - 8 - 4
3B = 2101 + 4
B = \(\dfrac{2^{101}+4}{3}\)