Các câu hỏi tương tự
cau 1: tinh gia tri cua x thoa manleft(x-3right)left(x^2+3x+9right)+xleft(x+2sqrt{2}right)left(2sqrt{2}-xright)-3cau 2.tinh GTLN cua bieu thuc2x-2x^2+13cau 3. tinh gia tri cua bieu thuc frac{3^{left(x+yright)^2}}{3^{left(x-yright)^2}}voi xyfrac{1}{2}cau 4. tim GTLN cua-3x^2-6x-4cau 5. cho ham so : f(x)frac{1}{5x+9}tinh gia tri cua fleft(frac{40}{25}right)cau 6. cho hinh thang can ABCD . Day nho AB,goc D bang 64 do. tinh so do goc ngoai tai A
Đọc tiếp
cau 1: tinh gia tri cua x thoa man
\(\left(x-3\right)\left(x^2+3x+9\right)+x\left(x+2\sqrt{2}\right)\left(2\sqrt{2}-x\right)=-3\)
cau 2.tinh GTLN cua bieu thuc
\(2x-2x^2+13\)
cau 3. tinh gia tri cua bieu thuc
\(\frac{3^{\left(x+y\right)^2}}{3^{\left(x-y\right)^2}}\)voi xy=\(\frac{1}{2}\)
cau 4. tim GTLN cua
\(-3x^2-6x-4\)
cau 5. cho ham so : f(x)=\(\frac{1}{5x+9}\)
tinh gia tri cua \(f\left(\frac{40}{25}\right)\)
cau 6. cho hinh thang can ABCD . Day nho AB,goc D bang 64 do. tinh so do goc ngoai tai A
cho 3 so x,y,z ti le nghich vs 3,4,6 . biet 2x^3- 3y^3+ 4z^3= 9875. khi do x+y+z=
CMR neu x,y,z la 3 so phan biet thi M co gia tri la so ngyen M=x^2/(x-y)(x-z) + y^2/(y-z)(y-x) + z^2/(z-x)(z-y)
1 chiec tau ngam chay voi van toc khong doi la 37km/h o do sau 100m so voi muc nuoc bien
a, Viet ham so f mieu ta su phu thuoc giua S (km) va thoi gian t (h) ma tau ngam da di
b,viet ham so g mieu ta su phu thuoc giua do sau h (m)cua tau ngam so voi muc nuoc bien va thoi gian t (h)
c,tinh g(2);g(3,5)
bai 1:tim xa)x+x2-x3-x40b)2x3+3x2+2x+30c)x4-2x3+10x2-20x0bai 2:tim cap so (x,y) bietxy+3x-4y12bai 3:voi gia tri nao cua xa)x3-x2+3x-30b)x3+x3+9x+90c)4x3-14x2+6x-210d)x2(2x2+3)+2x2+30bai 4:CMR hieu binh phuong 2 so le lien tiep thi chia het cho 8
Đọc tiếp
bai 1:tim x
a)x+x2-x3-x4=0
b)2x3+3x2+2x+3=0
c)x4-2x3+10x2-20x=0
bai 2:tim cap so (x,y) biet
xy+3x-4y=12
bai 3:voi gia tri nao cua x
a)x3-x2+3x-3>0
b)x3+x3+9x+9<0
c)4x3-14x2+6x-21<0
d)x2(2x2+3)+2x2+3>0
bai 4:CMR hieu binh phuong 2 so le lien tiep thi chia het cho 8
Tính GTBT cho x+y=5
a, A=3x2-2x+3y2-2y+6xy-100
b,B=x3+y3-2x2-2y2+3xy.(x+y)-4xy+3.(x+y)+10
c, Cho x+y=3, x2+y2=5
Tính x3+y3
Giup minh nha. ma minh do ai lam dc bai nay lam dc cho tien luon. ns thay do
cho 2 vd ve tinh so do goc va tinh do dai canh cua hinh thang vuong
1.cho \(M=\frac{2013+x}{2014-x}\)voi x la so tu nhien thi gia tri lon nhat cua M la ?
2. cho x va y thoa man 2x2+12y2-8x-12y+11=0
Tim cac so nguyen x,y thoa man: \(x^3+2x^2+3x+2=y^3\)