Các câu hỏi tương tự
Cho ba so a,b,c doi mot khac nhau va a+b/c=b+c/a=c+a/b .
Tinh gia tri cua bieu thuc :
M=(1+b/c)(1+c/a)(1+a/b)
giai chi tiet giup minh nha!
Cho ba so a,b,c doi mot khac nhau va a+b/c=b+c/a=c+a/b .
Tinh gia tri cua bieu thuc :
M=(1+b/c)(1+c/a)(1+a/b)
giainhanh,minhcangap!
Cho cac so thuc phan a,b,c khac nhau doi mot va thoa man a^2-b=b^2-c=c^2-a . CMR (a+b+1)()b+c+1(c+a+1)=-1- de hsg tinh mon toan 9 nam 2012
cho a,b,c khac nhau doi mot va 1/a+1/b+1/c=0.rut gon cac bieu thuc
N=bc/a^2+2bc+CA/B^2+2AC+AB/C^2+2AB
Giup minh voi cac ban !!!
Cho a + b + c = 0 va a^2 + b^2 + c^2 = 1 . khi do , gia tri bieu thuc a^4 + b^4 + c^4 = ????
cho 2 bieu thuc A=x+x^2/2-x va B=2x/x+1+3/x-2-2x^2+1/x^2-x-2 a, tinh gia tri cua A khi /2x-3/=1 b,tim dieu kien xac dinh va rut gon bieu thuc B c,tim so nguyen x de P=A.B dat gia tri lon nhat
mk dang can gap
Cho bieu thuc A = ( 1/ x^2 - x + 1/x-1):x+1/x^2 -2x +1 ( x khac 0;1;-1)
a) Rut gon bieu thuc A
b) Tinh gia tri bieu thuc A khi x=2014/2013
c)Tim dieu kien cua x de A co gia tri lon hon 1
cho a^3+b^3+c^3=3abc va a+b+c khac 0 . tinh gia tri bieu thuc N=\(\frac{a^2+b^2+c^2}{\left(a+b+c\right)^2}\)
giai chi tiet giup to may bai nay nha1. Cho tam giac ABC co trung tuyen AM . Goi I la trung diem cua AM. Tia BI cat AC tai D, qua M ke duong song song voi BD cat CD tai E. Biet BD18cm , khih do ID ? cm2. gia tri lon nhat cua bieu thuc Q 5-x2+2x2-4y2-4y3 . gia tri cua x thoa man (12x-5)(4x-1)+(3x-7)(1-16x)81 , x?4. x+y3 , gia tri cua bieu thuc Q x2+2xy+y2-4x-4y+1?5 . a+b+c0 va abc-2 thi a3+b3+c3 ?6. rut gon bieu thuc(a2+b2)2-4a2b2voi a2-b25 ta duoc ket qua ?
Đọc tiếp
giai chi tiet giup to may bai nay nha
1. Cho tam giac ABC co trung tuyen AM . Goi I la trung diem cua AM. Tia BI cat AC tai D, qua M ke duong song song voi BD cat CD tai E. Biet BD=18cm , khih do ID = ? cm
2. gia tri lon nhat cua bieu thuc Q= 5-x2+2x2-4y2-4y
3 . gia tri cua x thoa man (12x-5)(4x-1)+(3x-7)(1-16x)=81 , x=?
4. x+y=3 , gia tri cua bieu thuc Q = x2+2xy+y2-4x-4y+1=?
5 . a+b+c=0 va abc=-2 thi a3+b3+c3= ?
6. rut gon bieu thuc(a2+b2)2-4a2b2voi a2-b2=5 ta duoc ket qua ?