Tim phan so toi gian biet khi cong ca tu va mau cua phan so ay voi mau so cua no ta duoc mot phan so moi lon gap 3 lan phan so ban dau.
GIUP MINH GAP NHOA!!!!!!!!!!!!!!!
bai 1
cho bieu thuc A = 5/n+1 voi N THUOC Z
a, de A la phan so thi n co dieu kien gi ?
b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?
bai 2
cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :
a, M ko phai la phan so
b , M la phan so va cp gia tri nguyen ?
bai 3 viet tap hop cacs so nguyen sao cho :
-12/4 < x <6/3
Mot lop co 24 hoc sinh nam va18 hocsinh nu . Co bao nhieu cach chia to sao cho so nam va so nu duoc chia deu vao cac to .
Giup minh nha cac ban minh se tick va ket ban . Cam on cac ban !
A, Tim so tu nhien y de phan so 12/y co gia tri = 4
B, tim so tu nhien a de 3 phan so 21/a ; 22/a-1 ; 24/a+1 deu la so nguyen
1. Biet rang luong nuoc trong co the nguoi truong thanh chiem khoang 65% khoi luong co the.Hoi voi mot nguoi nang 70kg thi luong nuoc trong co the nguoi do la khoang bao nhieu ki-lo-gam.
2. So dan cua mot xa cuoi nam 2013 la 7000 nguoi,ti le tang dan so hang nam cua xa la 1,5%.Hoi den cuoi nam 2014,dan so cua xa do la bao nhieu nguoi.
3. Mot manh vuon hinh chu nhat co chieu dai 20m va chieu rong 15m.nguoi ta danh 25%dien tich manh vuon de trong rau muong ,10%dien tich de trong rau cai.Tinh dien tich phan dat trong rau muong,dien tich phan dat trong rau cai.
Giup minh voi nha cac ban!
Ai biet thi giup minh voi nha
Cau hoi la :tim so tu nhien co 5 chu so biet rang neu viet them chu so 2 vao dang sau so do thi duoc so lon gap 3 lan so co duoc bang cach viet them chu so 2 vao dang truoc so do
[ ai lam dung minh se tich cho]
Cho phan so 59/61.tim so tu nhien m sao cho cung tru ca tu va mau so da cho ddi m thi duoc phan so moi la 7/9
Tim tat ca cac phan so co tu so la -15 lon hon -3/7 va ho hon 5/8
tim tat ca cac phan so co mau so la 12 lon hon -2/3 va nho hon 1/4
lop 6A co 18 hoc sinh nam va 24 hoc sinh nu . Trong mot buoi sinh hoat lop ban lop truong muon chia cac ban thanh tung nhom sao cho so ban nam moi nhom deu bang nhau va so ban nu cung vay .Hoi co the chia duoc nhieu nhat bao nhieu nhom . Khi do moi nhom co bao nhieu ban nam , nu ?