Các câu hỏi tương tự
Tìm GTNN của
a)\(A=\frac{3x^2-6x+17}{x^2-2x+5}\)
b)\(C=\frac{x^6+27}{x^4-3x^3+6x^2-9x+9}\)
c)\(D=\frac{x^6+512}{x^2+8}\)
tìm GTNN của \(D=\frac{x^6+512}{x^2+8}\)
Thực hiện phép tính:a)frac{2x+6}{3x^2-x}:frac{x^2+3x}{1-3x}b)frac{x+3}{x}-frac{x}{x-3}+frac{9}{x^2-3x}c)frac{x+3}{x^2-1}-frac{1}{x^2+x}d)frac{1}{3x-2}-frac{4}{3x+2}-frac{-10x+8}{9x^2-4}e)frac{3}{2x^2+2x}+frac{2x-1}{x^2-1}-frac{2}{x}f)left(frac{9}{x^3-9x}+frac{1}{x+3}right):left(frac{x-3}{x^2+3x}-frac{x}{3x+9}right)g)frac{8}{left(x^2+3right)left(x^2-1right)}+frac{2}{x^2+3}+frac{1}{x+1}
Đọc tiếp
Thực hiện phép tính:
a)\(\frac{2x+6}{3x^2-x}:\frac{x^2+3x}{1-3x}\)
b)\(\frac{x+3}{x}-\frac{x}{x-3}+\frac{9}{x^2-3x}\)
c)\(\frac{x+3}{x^2-1}-\frac{1}{x^2+x}\)
d)\(\frac{1}{3x-2}-\frac{4}{3x+2}-\frac{-10x+8}{9x^2-4}\)
e)\(\frac{3}{2x^2+2x}+\frac{2x-1}{x^2-1}-\frac{2}{x}\)
f)\(\left(\frac{9}{x^3-9x}+\frac{1}{x+3}\right):\left(\frac{x-3}{x^2+3x}-\frac{x}{3x+9}\right)\)
g)\(\frac{8}{\left(x^2+3\right)\left(x^2-1\right)}+\frac{2}{x^2+3}+\frac{1}{x+1}\)
1. Tính:
\(F=\frac{\frac{x^3-x}{x+1}+\frac{2x-2}{1+\frac{x}{2}}}{\frac{x^3-3x^2}{x-3}-\frac{2x^2+8}{x+2}}\)
2.
\(G=\frac{\frac{x^4+1}{x^3-1}-x}{\frac{x}{x^2+x+1}-\frac{2}{x-1}}\)
Tìm giá trị của G. Khi x=2017
Tìm GTNN, biết:
\(D=\frac{x^6+512}{x^2+8}\)
Tìm x :
a) \(\frac{3x+2}{2}-\frac{3x+1}{6}=2x+\frac{5}{3}\)
b) \(\frac{x+1}{x-2}+\frac{x-1}{x+2}=\frac{2\left(x^2+2\right)}{x^2-4}\)
c) \(\left(2x+3\right)\left(\frac{3x+8}{2-7x}+1\right)=\left(x-5\right)\left(\frac{3x+8}{2-7x}+1\right)\)
d) \(\left(x+1\right)^2-4\left(x^2-2x+1\right)=0\)
1) Giải các phương trình.a) x(x-1)x(x+2)b) -3x+22x+8c) frac{3x-3}{4}2-frac{x-2}{8}d) left(x-frac{1}{2}right)left(x+frac{4}{3}right)0e) frac{2}{5}x+x-frac{1}{3}-frac{4}{7}x+frac{5}{6}f) frac{3x-5}{9}1+frac{2x+4}{6}g) frac{2x-1}{5}-frac{x-2}{3}frac{x+7}{15}h) frac{2x+1}{x-2}3k) frac{2}{x-3}+frac{x-5}{x-1}1
Đọc tiếp
1) Giải các phương trình.
a) x(x-1)=x(x+2)
b) -3x+2=2x+8
c) \(\frac{3x-3}{4}=2-\frac{x-2}{8}\)
d) \(\left(x-\frac{1}{2}\right)\left(x+\frac{4}{3}\right)=0\)
e) \(\frac{2}{5}x+x-\frac{1}{3}=-\frac{4}{7}x+\frac{5}{6}\)
f) \(\frac{3x-5}{9}=1+\frac{2x+4}{6}\)
g) \(\frac{2x-1}{5}-\frac{x-2}{3}=\frac{x+7}{15}\)
h) \(\frac{2x+1}{x-2}=3\)
k) \(\frac{2}{x-3}+\frac{x-5}{x-1}=1\)
Tìm max của:
C = \(\frac{x^6+27}{x^4-3x^3+6x^2-9x+9}\)
D = \(\frac{x^6+512}{x^2+8}\)
Tìm GTNN của:
A= \(x^2+2y^2+3x-y+6\)
B= \(\frac{x^2-1}{x^2+1}\)
C= \(\frac{x^2-3x+3}{x^2-2x+1}\)