trong 3 so a, b, c co 1 so duong, 1 so am, 1 so bang 0. Hoi 3 so do la loai so nao, biet gia tri tuyet doi cua a=b^2nhan (b-c)
cho 3 so a,b,c la so nguyen . Trong do co 1 so nguyen am , 1 so nguyen duong va 1 so bang 0 , thoa man IaI=b^2.(b-c) . Hoi a,b,c thuoc loai so nao
cho4 so ko am a,b;c;d thoa man a+b+c+d=1 . Goi S la tong cac tri tuyet doi cua hieu tung cap so co duoc tu 4 so nay. S co the dat gia tri lon nhat la bao nhieu ?
xin loi cac ban vi cau hoi cua minh ko co dau nen hoi kho hieu mong cac ban giup do nha thankyou
S lon nhat bang 3 khi trong 4 so a,b, cd co 1 so bang 1con 3 so bang
Cho minh hoi bai nay. Chi can tra loi 1 cau cung duoc! Tick cho ai tra loi som nhat, day du nhat.
1. Cho so huu ti y=2a-1/-3. Voi gia tri nao cua a thi y la so duong, y la so am, khong phai so duong cung phai so am?
2. Cho so huu ti x=a-5/a (a khac 0). Voi gia tri nao cua a thi x la so nguyen?
3. Cho so huu ti x=a-3/2a (a khac 0). Voi gia tri nao cua a thi x la so nguyen?
Cau 1: So gan dung cua a = 2,57656 co 3 chu so dang tin viet voi dang chuan la?
Cau 2: Trong 4 lan can hoa chat, ta thu duoc ket qua voi do chinh xac 0,001g : 5,382g : 5,384g : 5,386g. Sai so tuyet doi va chu so chac (viet theo thu tu tuong ung) cua ket qua nay la?
Cau 3: Cho gia tri gan dung cua 8/17 la 0,47. Sai so tuyet doi cua 0,47 la?
Cau 4: Cho gia tri gan dung cua 3/7 la 0,429. Sai so tuyet doi cua 0,429 la?
Cau 5: Qua dieu tra, so dan o tinh B la 2.731.425 nguoi voi sai so uoc luong ko qua 200 nguoi. Cac chu so ko dang tin la hang nao?
Giup voi minh can sieu gap luon! Cam on moi nguoi nhieu nhieu
trong ba so nhuyen a,b,c co mot so nguyen duong va mot so nguyen am, mot so =0 ngoai ra con biet them rang |a|=b^2.(b-c). Hoi so nao am so nao duong , so nao =0
Trong 3 so a,b,c co 1 so nguyen a,1 so nguyen duong va1 so bang 0
tim 3 so do biet :IaI=b^2(b-c)
Tren bang cua 1 lop hoc co viet cac so:1;2;3;....; 2011;2012;2013.1 hoc sinh tien hanh 1 cong viec nhu sau:Xoa 2 so bat ki trong cac so do roi viet thay vao gia tri tuyet doi cua hieu 2 so da xoa,sau do lap lai cong viec tren cho den khi tren bang chi con lai 1 so.CMR so cuoi cung con lai khong the la so 0.
Cho so :
\(y =\frac{2a-1}{-3}\)
voi gia tri nao cua a thi
a) y la so duong
b) y la so am
c) y khong la so duong cung khong phai so am
a) Để y dương thì 2a-1 < 0
=> 2a < 1
=> a < \(\frac{1}{2}\)
b) Để y âm thì 2a-1 > 0
=> 2a > 1
=> a > \(\frac{1}{2}\)
c) Để y ko âm, ko dương thì 2a-1 = 0
=> 2a = 1
=> a = \(\frac{1}{2}\)
Tick cho mik nha