Ta có: \(\frac{1}{2}+\frac{1}{-3}+\frac{1}{4}+\frac{1}{6}\)
\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{6}+\frac{1}{4}\)
\(=\frac{1}{6}+\frac{1}{6}-\frac{1}{4}\)
\(=\frac{1}{3}+\frac{1}{4}=\frac{7}{12}\)
A=1phan71+2phan70+3phan69+4phan68+...+70phan2+70phan1 va B=1phan 1phan2+1phan3+1phan4+1phan5+...+1phan71+1phan72
Chung minh rang 1phan 22+1phan32+1phan42+...+1phan1002<1
171000 co chu so tan cung la bao nhieu
ai nhanh nhat minh tick cho 3 cai
\(\frac{64}{27}\)doi ra so ngu la gi vay.
AI NHANH MINH TICK CHO,THAT LA NHIEU LUON
Cho a,b,c la cac so nguyen to thoa man ab+ba=c.Khi doS=a5+b4+c3 co gi atri la bao nhieu? giup mk nhe bn nao nhanh tay mk tick cho
x/2 du 3 x/3 du du 2 hoi x la bao nhieu biet x < 15 ai lam nhanh minh tich 20 cai
1) co bao nhieu boi cua 4 tu 10 den 200
2) co bao nhieu so vua la boi cua 5 vua la uoc cua 50
3) tim cac so tu nhien N sao cho :
A) N-1 la uoc cua 28
B) 2 nhan N +1 la uoc cua 18
C) N nhan (N +2)=8
3 like cho nguoi giai nhanh nhat 3 cau tren . Giai ki nhe
Cho A={3;-4;5}va B={-3;4;6; 8}
a, Co bao nhieu tich a×b voi a€A;b€B duoc tao thanh
b,Co bao nhieu tich lon hon 0? bao nhieu tich nho hon 0
c,Co bao nhieu tich la boi cua 3 nhung ko la boi cua 9
d,Co bao nhieu tich la uoc cua -24
Cho ps A=2n-1/n+3
Tim so nguyen n de A co gia tri la 1 so nguyen
Pls,lam nhanh nhe mai minh di hoc. Thanks ban nhieu, minh se tick cho ai lam ne:)
