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Các câu hỏi tương tự
b1 tim so tu nhien lon nhat co 3 chu so biet rang chia cho 5; 7 ; 9 thi co so du lan luot la 2 ; 4 ;6
b2 tim x biet
a ) 2x +3 chia het cho x -1
b)3x+5 chia het cho x+1
b3 chung to rang 3n+4 va 4n +5 la 2 so nguyen to cung nhau vs moi so TN
tim cac so nguyen x de ( A=x+4/x-2)+(2x+5/x-2) la 1 so nguyen
Cho 21 so nguyen trong do tong cua 5 so bat ki la 1 so nguyen duong. CMR tong cua 21 so do la 1 so nguyen duong
1) Tinh x,y:
(3x-1).(y+4)=-13
2) \(\frac{x-3}{x+5}\)la so nguyen
3) 2x-5:x-2
4) \(x^2+1\)la B(x+1)
tim so nguyen x
biet rang x+5 la so nguyen am nho nhat co 2 chu so
bai 2 tim so nguyen x biet rang x-7 la so nguyen am lon nhat co 2 chu so
nhanh len minh dang gap minh like nhanh len
So cac so nguyen x thoa man 15 - |-2x+3|.|5+4x| = -19 la
So cac so nguyen x thoa man : 15 - | -2x + 3 |.|5 + 4x |= -19 la
tìm n thuộc N ,sao cho
a,7 x n la so nguyen to
b,n x {5+4} la so nguyen to
so cap ( x , y ) nguyen thoa man (y +1 ) (2x +3 ) = 7 la.....