\(\frac{7x}{x-1}-\frac{5}{x+1}-\frac{x+21}{x^2-1}=0\)
\(\frac{7x\left(x+1\right)}{\left(x-1\right)\left(x+1\right)}-\frac{5\left(x-1\right)}{\left(x+1\right)\left(x-1\right)}-\frac{x+21}{\left(x+1\right)\left(x-1\right)}=0\)
\(\frac{7x^2+7x-5x+5-x-21}{\left(x-1\right)\left(x+1\right)}=0\)
\(\frac{7x^2+x-16}{\left(x-1\right)\left(x+1\right)}=0\)
Đến đây tự làm
1) giải phương trình:
a) \(\left(2x+3\right)\left(\frac{3x+8}{2-7x}+1\right)=\left(x+5\right)\left(\frac{3x+8}{2-7x}+1\right)\)
b) \(\frac{7x+10}{x+1}\left(x^2-x-2\right)-\frac{7x+10}{x+1}\left(2x^2-3x-5\right)=0\)
c) \(\frac{2x+5}{x+3}+1=\frac{4}{x^2+2x-3}-\frac{3x-1}{1-x}\)
d) \(\frac{13}{2x^2+x-21}+\frac{1}{2x+7}+\frac{6}{9-x^2}=0\)
e) \(\frac{x-49}{50}+\frac{x-50}{49}=\frac{49}{x-50}+\frac{50}{x-49}\)
f) \(\frac{1+\frac{x}{x+3}}{1-\frac{x}{x+3}}=3\)
giải phương trình :
1) x-\(\frac{2x-5}{5}+\frac{x+8}{6}=7+\frac{x-1}{3}\)
2) 3(x+1)(x-1)-5=3x2-2
3) x2+10+21=0
5) 2x2-7x+6=0
6) x3-4x2+5x
7) x4+4x3+4x2-4x-5=0
8) \(\frac{x-12}{77}+\frac{x-11}{78}=\frac{x-74}{15}\frac{x-73}{16}\)
mình cần gấp 8 câu này bạn nào giải ddc mình tặng thẻ cào 50k nhé !
Giải Phương trình
a, \(\frac{x+4}{2x^2-5x+2}+\frac{x+1}{2x^2-7x+3}=\frac{2x+5}{2x^2-7x+3}\)
b, \(\frac{x^2}{x^2+2x+2}+\frac{x^2}{x^2-2x+2}-\frac{4.\left(x^2-5\right)}{x^4+4}=\frac{322}{65}\)
c, \(\frac{1}{x-1}+\frac{2x^2-5}{x^3-1}=\frac{4}{x^2+x+1}\)
Trình bày cách làm nữa nha
Giải phương trình:
1) \(\frac{7x-1}{6}+2x=\frac{16-x}{5}\)
2) \(\frac{10x+3}{12}=1+\frac{6+8x}{9}\)
3)\(\frac{8x-3}{4}-\frac{3x-2}{2}=\frac{2x-1}{2}+\frac{x+3}{4}\)
4)\(\frac{3\left(3-x\right)}{8}+\frac{2\left(5-x\right)}{3}=\frac{1-x}{2}-2\)
5)\(\frac{2\left(x-3\right)}{7}+\frac{x-5}{3}-\frac{13x+4}{21}=0\)
6)\(\frac{6x+5}{2}-\left(2x+\frac{2x+1}{2}\right)=\frac{10x+3}{4}\)
7)\(\frac{2x-1}{5}-\frac{x-2}{3}-\frac{x+7}{15}=0\)
8)\(\frac{x+4}{5}-x+4=\frac{x}{3}-\frac{x-2}{2}\)
giải giúp mik với ạ
Giải các phương trình sau :
a. 3x - 2 (5 + 2x) = 45 - 2x
b. \(\frac{x-3}{5}=6-\frac{1-2x}{3}\)
c.\(\frac{5\left(x-1\right)+2}{6}-\frac{7x-1}{4}=\frac{2\left(2x+1\right)}{7}-5\)
d. (x - 1) (5x + 3) = (3x - 8) (x - 1)
e. (x - 1) (x2 + 5x - 2) - (x3 - 1) = 0
f.\(\frac{x-17}{33}+\frac{x-21}{29}+\frac{x}{25}=4\)
g. \(\frac{x+1}{65}+\frac{x+3}{63}=\frac{x+1}{61}+\frac{x+7}{59}\)
h.\(\frac{x+5}{2015}+\frac{x+4}{2014}+\frac{x+4}{1002}+\frac{x+6}{1003}=6\)
k.\(\frac{148-x}{25}+\frac{169-x}{23}+\frac{186-x}{21}+\frac{199-x}{19}=10\)
Giải các phương trình sau :
a. 3x - 2 (5 + 2x) = 45 - 2x
b. \(\frac{x-3}{5}=6-\frac{1-2x}{3}\)
c.\(\frac{5\left(x-1\right)+2}{6}-\frac{7x-1}{4}=\frac{2\left(2x+1\right)}{7}-5\)
d. (x - 1) (5x + 3) = (3x - 8) (x - 1)
e. (x - 1) (x2 + 5x - 2) - (x3 - 1) = 0
f.\(\frac{x-17}{33}+\frac{x-21}{29}+\frac{x}{25}=4\)
g. \(\frac{x+1}{65}+\frac{x+3}{63}=\frac{x+1}{61}+\frac{x+7}{59}\)
h.\(\frac{x+5}{2015}+\frac{x+4}{2014}+\frac{x+4}{1002}+\frac{x+6}{1003}=6\)
k.\(\frac{148-x}{25}+\frac{169-x}{23}+\frac{186-x}{21}+\frac{199-x}{19}=10\)
\(\text{Giải phương trình sau:}\)
\(\frac{1}{x^2+1}+\frac{1}{x^2+3x+2}+\frac{1}{x^2+5x+6}+\frac{1}{x^2+7x+12}=\frac{4}{5}\)
THKS~~~
giải phương trình:\(\frac{1}{x^2+5x+6}+\frac{1}{x^2+7x+12}+\frac{1}{x^2+9x+20}+\frac{1}{x^2+11x+30}=\frac{1}{8}\)
Giải phương trình\(\frac{1}{x^2+7x+12}+\frac{1}{x^2+9x+20}+\frac{1}{x^2+11x+30}=\frac{1}{18}\)
