a+3c+a+2b=8+9
=>2a+2b+3c=17
=>2(a+b+c)+c=17
vì a+b+c lớn nhất
=>2(a+b+c) lớn nhất
=>c nhỏ nhất không âm
=>c=0
=>a=8
=>b=1/2
Vậy a = 8
a+3c+a+2b=8+9
=>2a+2b+3c=17
=>2(a+b+c)+c=17
vì a+b+c lớn nhất
=>2(a+b+c) lớn nhất
=>c nhỏ nhất không âm
=>c=0
=>a=8
=>b=1/2
Vậy a = 8
cho cac so a, b, c ko am thoa man: a+3c=2016,a+2b=2017. tim gia tri lon nhat cua bieu thuc:P=a+b+c
ai tra loi xong ma dung thi to tick cho. con neu ko tra loi duoc ma kb voi to hoac tick cho dap an dung cua to thi to cung tick
cho tam giac ABC co B va C la goc nhon;M nam gia B va C goi d la tong cac khong cach tu B va C den AM. a) CM: d<BC b) xac dinh vi tri diem M tren BC de d dat gia tri lon nhat
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
cho 4 so ko am a.b.c.d thoa man a+b+c+d=1.goi S la tong cac gia tri truyen doi cua hieu tung cap so co duoc tu 4 so nay..S co the dat duoc gia tri lon nhat bang bao nhieu
cho 2 so huu ti x= 2a+7/5 va y = 3b-8/-5 voi gia tri nao cua a,b thi
a) x,y la so huu ti duong
b) x,y la so huu ti am
c) x,y khong la so huu ti am khong la so huu ti duong
ai tra loi nhanh ,dung mk tick cho
bai 1 tim cac stn x y z sao cho x+y+z=xyz
bai 2cmr neu m^2+mn+n^2chia het cho 9 voi m ,n la cac stn thi m,n chia het cho 3
bai 3 tim stn n nho nhat de cac phan so sau toi gian
7/n+9.8/n+10,...,31/n+33
bai 4chung to rang phan so m^3+2m/m^4+3m^2 +1 toi gian
bai 5 a,cmr khong ton tai so chinh phuong nao co dang abab
b,cho 51 so nguyen duong khong vuot qua 100 cmr ton tai 2 so trong 51 so noi tren ma 1 so chia het cho so con lai
c,tim cac so co 3 chu so sao cho hieu cua so ay va gom 3 chu so ay viet theo thu tu nguoc lai la mot so chinh phuong
bai 6cmr A=2x(x+y-1)+y^2+1 luon nhan gia tri khong am voi moi x,y
bai 7 tim hai so nguyen duong sao cho tong ,hieu thuong (so lon chia cho so nho )cua chung cong lai duoc 38
bai 8 cho ba so a,b,c thoa man a/2009=b/2010=c/2011
tinh gia tri cua bieu thuc M=4(a-b)(b-c)-(c-a)^2
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?
cho bieu thuc A = 2012 / 9 - x . Voi gia tri nguyen cua x thi A co gia tri lon nhat ? Tim tri lon nhat do .
tim cac so x,y,z ko am thoa man x+6y=12 va 4x +5z=2018 sao cho F=x+y+z co gia tri lon nhat