\(\frac{a}{b}=\frac{3}{6}=\frac{1}{2}\Rightarrow\frac{a}{1}=\frac{b}{2}=\frac{a+b}{1+2}=\frac{16}{3}\Rightarrow\hept{\begin{cases}a=5\frac{1}{3}\\b=10\frac{2}{3}\end{cases}}\)
cac ban giai giup minh bai tap nay khan cap nhe:
cho cac so a,b,c la ba so nguyen khac 0, thoa man: ab/(a+b)=bc/(b+c)=ac/(a+c) ( gia thiet cac ti le thuc deu co nghia). tinh M= (ab + bc + ca)/(a^2+b^2+c^2)
xin cam on rat nhieu
cac ti so sau day co lap dc ti le thuc ko
a 13:4 va 25:2
b 0,25:1,75 va 3:21
chung minh rang tu ti le thuc a/b=c/d (a-b khac 0,c-d khac 0) ta co the suy ra ti le thuc a+b/a-b=c+d/c
ai giai nhanh va dung cho toi hieu toi se tich nguoi do
Tim so co 3 chu so biet rang : so do la B(18) va cac chu so cua no ti le theo 1;2;3
cho ti le thuc \(\frac{a}{b}\)=\(\frac{c}{d}\)
chung minh rang\(\frac{a}{b}\)=\(\frac{7a+5c}{7b+5d}\)[b+d khac 0]
cac ban co biet tai sao minh go dau cac chu cai thi chu cai do va dau deu bien mat khong? giup minh voi , cau hoi tren la 1 vi du
Cho da thuc f(x)=ax+b. Biet f(-2)=0 va f(2)=8. Tim a va b
mong cac ban giup do <3
I.Dai so:
Cau1. Gia tri tuyet doi cua so huu ti x duoc xac dinh nhu the nao?
Cau2. Viet cac cong thuc:nhan, chia hai luy thua cung co so. luy thua cua: luy thua, mot tich, mot thuong.
cau3. Ti le thuc la gi? Tinh chat co ban cua ti le thuc. Viet cong thuc tinh chat cua day ti so bang nhau.
cau4. Dinh nghia can bac hai cua mot so am? cho vi du?
Cau 5 Khi nao thi hai dai luong y va x ti le thuan voi nhau? Tinh chat cua hai dai luong ti le thuan ?
Cau 6:Khi nao thi hai dai luong y va x ti le nghich voi nhau? Tinh chat cua hai dai luong ti le nghich?
Cau 7:Do thi cua ham so y= ax ( a khac 0) co dang nhu the nao?
do cac ban nha tim tap hop nguyen a;b thoa man :a.b=3.(b-a)
neu ai lam duoc minh cho nich thoi loan vip nha 11 hoac nick bang bang vip co ca quan cong va kaka shi lever 5
va minh se cho nick kiem vu cung hoi vip thoi nhe rat hot .................................................................................
.................................................co len .......................................................................................co len................
.........................co len..............................................co len.................................HOT NHAT/
lap ca ti so bang nhau trong cac ti so sau roi lap cac ti le thuc
a)1/3; 2,5/5,5; 4:12; -7/4
b) 4/9; 18/42 ; -2/-4,5; 21:49; 5/9
2lap tac ca cac ti le thuc co duoc tu cac so sau 2,4;4,0,2,1 5,6
