CMR: Neu so abc (ke dau) la so nguyen to thi b2-4ac khong phai la so chinh phuong
1,Tim so nguyen to x,y de:
x^2-6y^2=1
2, Cho P va P+2 nguyen to(P>3)
a, Chung minh P+1 chia het cho 6
b, P+6; P+12;P+18;P+24 nguyen to.
Cho A=2x-3 ; B=6-x
a- So sanh A;B
b- Tim x nguyen de A.B co gia tri nguyen
Tim n nguyen de bieu thuc co gia tri nguyen :
A= \(\dfrac{3n+1}{n+1}\) ( voi n khac -1)
cho p va 2p+1 cung la 2 so nguyen to. chung minh p+1 chia het cho 6
Mn oi giup minh bai nay voi, toi minh di hoc roi
a, Tinh A = 1/3 + 1/3^2 + 1/3^3 + ..... +1/3^n
b, Tị so tu nhien co 2 chu so biet so do nhan voi 75 duoc tich la mot so chinh phuong
c, CMR: 1/3 + 2/3^2 +3/3^3 + ... + 101/3^101
cho ham so y=f(x)=ax+4 co do thi di qua diem A(a+1;a^3-a)
Tim A.
Voi a vua tim duoc, tinh gia tri cua x thoa màn(3x-1)=f(1-3x)
Xin chao tat ca moi nguoi-minh la mot hoc sinh.len day muon hoi mot cau hoi ve toan hoc.Mong moi nguoi giup do.Cho don thuc:M=1/3xy(-3xy2)2.
Thu gon M roi cho biet phan he so va phan bien cua don thuc tren.
Minh da lam duoc roi nhung minh muon len day de hoi moi nguoi lam the nao de minh khao lai ket qua cua ming co dung khong.Ban nao hay la giao vien hay la gia su nao lam duoc thi cho minh mot cau tra loi dung va chinh xac nhat gui cho minh nha.Minh cam on nguoi da giai duoc cau nay nhe.Lien he voi minh gan nhat nheeeeee!