Các câu hỏi tương tự
Tinh gia tri cua bieu thuc a^4+b^4+c^4,biet rang a+b+c=0 va:
a^2+b^2+c^2=2
Cho 2 bieu thuc :
A=\(\dfrac{x-3}{x+2}va\) B= \(\dfrac{3}{x+3}+\dfrac{2}{x-3}-\dfrac{3x-9}{x^2-9}\left(x-2,x\ne3x\ne-3\right)\)
a, Tinh gia tri bieu thuc A khi x=5
b, Chung minh : B=\(\dfrac{2}{x-3}\)
c, Biet C = A.B, Tim x de c = \(\dfrac{-1}{3}\)
Dang I: tinh gia tri bieu thuc
Bai 12: Cho x=2011. tinh gia tri chua bieu thuc
\(x^{2011}-2012x^{2010}+2012x^{2009}-2012x^{2008}+....-2012x^2+2012x-1\)
bai 11: Cho da thuc P(x)=ax\(^3\)+bx\(^2\)+cx+d (a khac 0)
Biet p(1)=100, p(-1)=50,p(0)=1,[(1)=120. Tinh p(3)
bai 10: Tam thuc bac hai la da thuc co dang f(x) =ax+b voi a,b,c la hang a khac 0. Hay xac dinh cac he so a,b biet f(1)=2 , F(3)=8
tinh gia tri cua bieu thuc A=\(\left(\frac{a-b}{c}+\frac{b-c}{a}+\frac{c-a}{b}\right)\))\(\left(\frac{c}{a-b}+\frac{a}{b-c}+\frac{b}{c-a}\right)\). cho biet a+b+c=0
Tinh gia tri cua bieu thuc A=x-2009/2009x+y
Biet x^2-2y^2=xy( voi 2009x+y khac 0 )
tinh gia tri bieu thuc biet 12x^2+20x+1. biet 3x^2+5x-2=0. mn lam jup nhe
tinh gia tri cua a,b biet_ 2a+6b+b2=-10
tim gia tri nho nhat cua bieu thuc biet a+b=1 va A=a3+b3
Tinh gia tri cua bieu thuc A, biet A= \(\frac{1}{2}\left(x^2+y^2\right)^2-2x^2y^2\)voi \(^{x^2-y^2=4}\)