Các câu hỏi tương tự
Tim cac gia tri nguyen cua x de phan thuc sau co gia tri nguyen:
\(A=\frac{2x^3-6x^2+x-8}{x-3}\)
\(B=\frac{x+2}{x+4}\)
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
Chung minh gia tri biêu thực sau ko phu thuốc vào gia tri cua x
(2+x)^2-x^2/2(x+1)
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.
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
1) Cho bieu thuc A=\(3+\frac{2}{x-1}\). Tinh gia tri cua bieu thuc A khi |2x-3|=1
2) Rut gon bieu thuc B=\(\frac{x}{x-1}\)-\(\frac{x-5}{x+1}\)-\(\frac{3-x}{1-x^2}\)
3) Tim cac gia tri nguyen cua x de bieu thuc \(\frac{B}{A}\)co gia tri nguyen duong
cho bieu thuc \(Q=\frac{12x-15}{x^2-7x+12}-\frac{x+5}{x-4}+\frac{2x-3}{3-x}\) . Tim x de gia tri cua Q nguyen
tim so nguyen x de bieu thuc sau co gia tri nguyen
A=\(\frac{4x^3-6x+8x}{2x-2}\)
cho p=x^3+2x^2-5x-6/x^2+x-6
a.tìm đkxđ của P
b.c/m rang voi moi gia tri cua x nguyen thoa man dkxd thi p gia tri nguyen