Các câu hỏi tương tự
1)
a) tim tat ca cac chu so a,b,c thoa man : abc - cba = 6b3
b) tim x biet : 1/21 + 1/28 +1/36 + ........ + 2/x(x+1) = 2/9
mot so tu nhien co 2 chu so trong do chu so hang chuc gap 3 lan chu so hang don vi neu doi chu cac chu so cua no thi duoc so moi nho hon so da cho 36 don vi tim so d acho
GIUP MINH NHE CAC BAN CA LOI GIAI NUA NHE
CAM ON CAC BAN
a) tim tat ca cac so co 5 chu so M=25xly thoa man M chia het cho 30
b)chung minh rang n(n+4).(n+2012) chia het co 3, voi moi so tu nhien n
1 cau cung duoc nha nho cuu to nha
tim tat ca cac so nguyen to a,b,c co the bang nhau thoa man abc<ab+bc+ca chung minh rang neu b la so nguyen to >3 thi (b+1)(b-1) chia het cho 24
Tim so tu nhien abc bé nhat thoa man abc =n mu 2 -1 va cba bang [n-2] . Tra loi abc=........
tim tat ca cac so co 2 chu so xy thoa man so A chia het cho 37 voi A=100..00(2009 chu so 0) 100..00(2011 chu so 0) xy
tim chu so tan cung cua 2^2015 nho lam loi giai nhe neu ai lam dung minh se tich minh lam roi
1 quyen SGK toan lop 6 co tat ca 32 trang .2 trang dau khong danh so hoi phai dung tat ca bao nhieu chu so de danh tat ca cac trang sach nay .
cac ban giai giup minh nhe!
tim tat ca cac so nguyen duong co dang abcde thoa man abc-de chia het cho 101