Các câu hỏi tương tự
Tim cac so nguyen a,b,c khac 0 , biet : a.b=c.b.c=4.a va a.c = 9b
bai 2
a)chung to rang P=4a2+4a chia het cho 8 voi moi a thuoc z
b)tim a thuoc z sao cho Q=a+7 chia het cho a (a khac 0)
c)tim a thuoc z sao cho M=a+1 chia het a -2 (a khac 2)
tim cac bo 2 so tu nhien a,b khac 0 thoa man: 1/a+1/b=5/6
cac ban giup minh voi
tim a b la 2 so tu nhien khac 0 sao cho
4a+9b=45
viet cac phep chia duoi dang phan so
a) m : 4 ( m thuoc Z)
b) 5 : a ( a thuoc Z , a khac 0 )
c) x : y ( x, y thuoc Z, y khac 0)
bai 1:tim x
a) (x+1/5)2+17/25=26/25
b)-1va 5/27-(3x-7/9)3=-24/27
bai 2:cho A=n+2/n-5 (n thuoc Z ;n khac 5).Tim x de A thuoc Z
Cho A = \(\frac{n-1}{n-3}\)(n Khac 0)
a) Tim n thuoc Z de A thuoc Z
b) Tim n thuoc Z de A co gia tri
Tim cac bo gom 3 chu so tu nhien a,b,c khac 0 sao cho 1/a+1/b+1/c=4/5
cho A=n-5/n+1 n thuoc z va n khac -1
a, tim n deA co gia tri ngyen
b, tim n de A la phan so toi gian
minh can gap cac ban lam mau len!!!!!!!!!!!!!!!!!!!!!!!!!