cho hai so tu nhien x va y thoa man 2^x+1*3^y=12^x khi do x+y=
ai giup dau tien cho 2 like
Cho hai so tu nhien x va y thoa man 2x+1.3y=12x
khi do x+y= ?
cho so tu nhien x va y thoa man : ( x+1999) X ( x+1995) = 3^y -81 . Tim x va y
cho cac so x,y,z thoa man( x-1)/2=(y-2)/3=(z-3)/4 va 2x +3y-z=95 khi do x+y+z =
ai nhanh minh tich
biet x,y la cac so tu nhien thoa man /x/.(y-3) =-1 vay x+y =
giai giup nha
ai nhanh truoc minh tick nha
thank you
1. Tim cac chu so x va Y
x + 3 = y ( y - 2)
2 . cho cac chu so ab tu nhien thoa man 3a+ 2b :17
C/M 10a + b : 17 Dieu nguoc lai co dung khong
Tim so tu nhien x,y,z sao cho x nho nhat thoa man :
7x^2 - 9y^2 + 29 = 0 va 9y^2n - 11z^2 - 25 = 0
minh dang can gap , giup minh nha , nho giai day du ,minh se tick cho
Tim gia tri lon nhat cua so tu nhien a thoa man 2/3 so tu nhien nho nhat 4 . Tim so a36b biet so do co 4 chu ao khi chia cho 2, 5 va 9 dau du 1
1.so cac so nguyen x thoa man x2014=x2
2. so cac so co 3 chu so chia 7 du 3
3.dieu kien de /x+5/+/-3+y/> 0
4. cho 20 diem phan biet , trong do co a diem thang hang. Qua hai diem ta ve duoc 1 duong thang . Tim a biet ve duoc 170 duong thang
5. nguoi ta viet cac so tu nhien lien tiep bat dau tu 1 den 2014 lien nhau thanh 1 so tu nhien A . hoi so tu nhien A co bao nhieu chu so
6. cho tong s =2+5+8+11+14+...+3002 . hoi so hang thu 101 cua tong
cho x,y thoa man :x-2/2=y-3/3 va x+y=10 khi do xy=
áp dụng tc dãy tc = nhau ta có:
x-2/2=y-3/3=x-2+y-3/2+3=x+y-2-3/5=10-5/5=5/5=1
=>x-2/2=1=>x-2=2=>x=4
=>y-3/3=1=>y-3=3=>y=6
vậy x.y=4.6=24
\(\frac{x-2}{2}=\frac{y-3}{3}=\frac{x-2+y-3}{2+3}=\frac{x+y-5}{5}=\frac{10-5}{5}=1\)
=> x- 2=2 ; y-3=3
=> x = 4 ; y=6
=> xy = 24