Các câu hỏi tương tự
tim phan so a/b bang phan so 30/54 va co tong tu bang 126
a,timx;y sao cho 2^x=4^y-1; 27^y= 3^x+8
b,tim ba phan so biet rang tong cua chung bang 3 3/7(hon so),cac tu cua chung ti le voi 3,4,5,cac mau cua chung ti lt voi5,1,2
tim cac so x,y,z biet x -1 phan 2 bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50
Viet cac so sau duoi dang phan so:
a, 2,(14) b,-2,(15)
c,-4,3(2) d,0,14(8)
Tim cac so nguyen to a, b co 1 chu so de so x bang 5 x a phan 6 x b viet duoc duoi dang:a, so thap phan huu hanb, so thap phan vo han tuan hoan
Cho tam giac ABC co Goc A bang 60o Tia phan giac cua goc ABC cat tia phan giac cua goc ACB o I
a) Cho biet ABC=2xACB Tinh so do ACB
b) Tinh So do BIC
1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15
phan so duong thoi gian co mau khac 1 biet rang tong cua tu va mau bang 27
so m duoc chia thanh ba phan ti le voi 0.5;1/2/3;2/1/4.Tim m biet rang tong cac binh phuong cua ba so do bang 4660
Cho don thuc A=(-2xy)-4/5x^2y^3 a,Thu gon don thuc tren ,cho biet phan he so va phan bien ,tim bac cua don thuc b,Tinh gia trim cua don thuc tai x=1,y=-1