bài tập 1: giải các phương trình sau:
a, \(\dfrac{3}{1-4x}\)= \(\dfrac{2}{4x+1}\)- \(\dfrac{8+6x}{16x^2-1}\)
b, \(\dfrac{3}{5x-1}\)+\(\dfrac{2}{3-5x}\)=\(\dfrac{4}{\left(1-5x\right)\left(5x-3\right)}\)
c, \(\dfrac{x+2}{x+1}\)+\(\dfrac{3}{x-2}\)=\(\dfrac{3}{x^2-x-2}+1\)
d, \(\dfrac{5-x}{4x^2-8x}+\dfrac{7}{8}=\dfrac{x-1}{2x\left(x-2\right)}+\dfrac{1}{8x-16}\)
e, \(\dfrac{x+6}{x+5}+\dfrac{x-5}{x+6}=\dfrac{2x^2+23x+61}{x^2+x-30}\)
f,...
Đọc tiếp
bài tập 1: giải các phương trình sau:
a, \(\dfrac{3}{1-4x}\)= \(\dfrac{2}{4x+1}\)- \(\dfrac{8+6x}{16x^2-1}\)
b, \(\dfrac{3}{5x-1}\)+\(\dfrac{2}{3-5x}\)=\(\dfrac{4}{\left(1-5x\right)\left(5x-3\right)}\)
c, \(\dfrac{x+2}{x+1}\)+\(\dfrac{3}{x-2}\)=\(\dfrac{3}{x^2-x-2}+1\)
d, \(\dfrac{5-x}{4x^2-8x}+\dfrac{7}{8}=\dfrac{x-1}{2x\left(x-2\right)}+\dfrac{1}{8x-16}\)
e, \(\dfrac{x+6}{x+5}+\dfrac{x-5}{x+6}=\dfrac{2x^2+23x+61}{x^2+x-30}\)
f, \(\dfrac{x^2-x}{x+3}-\dfrac{x^2}{x-3}=\dfrac{7x^2-3x}{9-x^2}\)
các bn giúp mik với!! vài câu cx được
a: \(\Leftrightarrow-12x-4=8x-2-8-6x\)
=>-12x-4=2x-10
=>-14x=-6
hay x=3/7
b: \(\Leftrightarrow3\left(5x-3\right)-2\left(5x-1\right)=-4\)
=>15x-9-10x+2=-4
=>5x-7=-4
=>5x=3
hay x=3/5(loại)
c: \(\Leftrightarrow x^2-4+3x+3=3+x^2-x-2\)
\(\Leftrightarrow x^2+3x-1=x^2-x+1\)
=>4x=2
hay x=1/2(nhận)