Các câu hỏi tương tự
1. hinh vuong co do dai canh 6\(\sqrt{2}\) thi do dai duong cheo cua hinh vuong do la ?cm
2.cho 2 phan thuc Q=\(\frac{12x^2+20x+3}{6x^2+43x+7}\)va P=\(\frac{8x^2+36x+36}{x^2+10x+21}\)voi tat ca cac gia tri cua x de 2 phan thuc P vaQ xac dinh thi khi do \(\frac{Q}{P}\)= ?
3.cho phan thuc A=\(\frac{2x^2+5x+8}{x^2-x+56}\)tap hop cac gia tri cua x de phan tuc A ko xac dinh la
cho 2 phan thuc \(Q=\frac{12x^2+20x+3}{6x^2+43x+7}\)va\(P=\frac{8x^2+36x+36}{x^2+10x+21}\)voi tat ca cac gia tri cua x de 2 phan tuc Q va P xax dinh thi khi do \(\frac{P}{Q}\)=?
cho phan thuc 4x-4/2x^2-2 :
a) Tim dieu kiem xac dinh
b)cho gia tri cua x=-2 tinh phan thuc
c) Tim gia tri cua x de gia tri phan thuc la so nguyen
cho bieu thuc : M ( x phan x^2 -25 - x-5 phan x^2 +5x ) : 2x-5 phan 5x - x^2
a) rut gon M
b) tinh gia tri cua M voi x = -2010
c) tim tat ca cac gia tri nguyen cua x de M 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= \(\frac{x^2}{4}+3x+y^2-\frac{14}{5}y+\frac{425}{25}la\)
cho phan thuc \(\frac{x+1}{x^2+x}\)
a) tim dieu kien cua x de gia tri phan thuc duoc xac dinh
b) rut gon phan thuc
c) tinh gia tri phan thuc tai x = 2014
bai 1
a = (3x / 2x + 4 ) + (x +3 /x ^ 2 - 4 )
a . tim x de gia tri phan thuc a duoc xac dinh
b. rut gon a
c. tinh gia trin cua a khi x bang -3
d . tim gia tri cua x de phan thuc co gia tri bang 2
1.cho phan thuc P=\(\frac{5x-4y}{5x+4y}\)voi 25x2+16y2=50xy.khi do gia tri cua bieu thuc P=\(\frac{1+P^2}{1-P^2}\)la
2.gia tri lon nhat cua bieu thuc B=\(\frac{14}{\frac{x^2}{4}-3x+16}la\)
3.gia tri cua a de da thuc A=2x3+7x2+ax+3 chia het cho B=(x+1)2la a=?
C =9x^2-16/3x^2-4x
voi gia tri nao cua x thi phan thuc tren duoc xac dinh?