Các câu hỏi tương tự
1.gia tri x thoa man x+(3x+1)2+1=9(x2+1)
2. rut gon bieu thucA=(a+b+c)2-(a-b-c)2-4b(a+c)+88
3.GTNN cua bieu thuc 4x2-4x-999+4x(1+x3)
4 cho hinh thang ABCDcoAB // CD , goc DAC=90 do , co duong cao AH , goc DAH =15 do . so do goc ACD la...
cho hinh thang can abcd co (ab//cd) co bdc=45 . goi o la giao diem cua ab va cd a) cm tam giac doc vuong can b) tinh dien tich cua hinh thang abcd, biet bd=6 cm
tim gia tri x nguyen de bieu thuc (3x2-4x+x-1)/(3x+2) co gia tri nguyen
tim gia tri x nguyen de bieu thuc (3x3-4x2+x+1)/(x-4) co gia tri nguyen
1. cho phan tuc Afrac{x^2+5x+4}{x^2+x-12}tap hop cac gia tri cua x de phan thuc A ko xac dinh la 2.cho hinh thang ABCD co dien tich la18cm2. duong cao AH 3cm . Do dai duong trung binh hinh thang la3.cho x, y nguyen thoa man x2+4x+y2-120 . khi do gia tri lon nhat Px2+y2 la Pmax?4.gia tri nho nhat cua bieu thuc A frac{x^2}{4}+3x+y^2-frac{14}{5}y+frac{425}{25}la
Đọc tiếp
1. cho phan tuc A=\(\frac{x^2+5x+4}{x^2+x-12}\)tap hop cac gia tri cua x de phan thuc A ko xac dinh la
2.cho hinh thang ABCD co dien tich la18cm2. duong cao AH =3cm . Do dai duong trung binh hinh thang la
3.cho x, y nguyen thoa man x2+4x+y2-12=0 . khi do gia tri lon nhat P=x2+y2 la Pmax=?
4.gia tri nho nhat cua bieu thuc A= \(\frac{x^2}{4}+3x+y^2-\frac{14}{5}y+\frac{425}{25}la\)
tim gia tri nho nhat cua bieu thuc tim gia tri nho nhat cua bieu thuc x^4-4x^3+12x^2-16x+16
Cho hinh thang vuong ABCD ( goc A bang goc D = 90 do) AB= 3cm, CD = 7cm,AD = 4cm
A) Tinh dien tich hinh thang ABCD
B) Goi M,N lan luot la trung diem cua AD,BC,H la hinh chieu cua N tren CD. Tinh dien tich tu giac MNHD
cho hinh thang ABCD co AB//CD, goc C+goc D=90,CD>AB.Goi E,F,M,N lan luot la trung diem cua AB,CD,Ac,DB.CMR
a,tg EFMN la hinh chu nhat
b. EF=(CD-AB)/2
c, DA cat CB tai K. CM K,E,F thang hang
d,cho KD=8cm, BC=10cm. tinh dien thich tg ABCD va EMFN
cho hinh thang ABCD co day AB//CD va AB<CD. E la trung diem cua BC. biet dien tich tam giac ADE=10cm2 tinh dien tich hinh thang ABCD
cho hinh thang can ABCD co AB//CD, C=D=450 canh ben =6cm.goi E,F,G,H lan luot la trung diem cua AB,BD,CD,AC.tinh dien tich EFGH