x.(x-1)+1/x.(1/x-1)=0
⇔ x2-x+1/x2-1/x
⇔ x4-x3+1-x=0
⇔ x3(x-1)+ -(x-1)=0
⇔ (x3-1)(x-1)=0
⇔ x3-1=0 ⇔ x=1 và -1
hoặc x-1=0 ⇔ x=1
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Giải phương trình
a)dfrac{x+3}{x-3}-dfrac{x-3}{x+3}dfrac{36}{x^2-9}
b) x2-x-60
c)dfrac{2x-1}{5}-dfrac{x-2}{3}dfrac{x+7}{15}
d)dfrac{x-2}{2}+dfrac{x+2}{6}dfrac{x-1}{3}
e)dfrac{x+4}{x-1}-dfrac{1}{x}dfrac{1}{xleft(x-1right)}
f) 2x+722-3x
g)(x-7)(2x+8)0
GIÚP MÌNH VỚI MAI LÀ NỘP BÀI RỒI
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Giải phương trình
a)\(\dfrac{x+3}{x-3}-\dfrac{x-3}{x+3}=\dfrac{36}{x^2-9}\)
b) x2-x-6=0
c)\(\dfrac{2x-1}{5}-\dfrac{x-2}{3}=\dfrac{x+7}{15}\)
d)\(\dfrac{x-2}{2}+\dfrac{x+2}{6}=\dfrac{x-1}{3}\)
e)\(\dfrac{x+4}{x-1}-\dfrac{1}{x}=\dfrac{1}{x\left(x-1\right)}\)
f) 2x+7=22-3x
g)(x-7)(2x+8)=0
GIÚP MÌNH VỚI MAI LÀ NỘP BÀI RỒI
Giải phương trình
a) (x+3)(x+1)(x2+2)0
b) (x2-4)(2x+1)0
c) 4x2+4x+10
d) dfrac{2x}{3}-3left(7-xright)dfrac{4x-11}{8}
e) dfrac{5left(x-3right)}{2}-dfrac{4}{3}dfrac{3left(x-1right)}{4}+6
f) dfrac{2}{3x}-dfrac{1}{2x}dfrac{3}{4x^2}
g) dfrac{2}{x-3}dfrac{1}{x+2}
h)dfrac{3}{x+3}-dfrac{1}{x-2}dfrac{5}{2left(x+3right)}
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Giải phương trình
a) (x+3)(x+1)(x2+2)=0
b) (x2-4)(2x+1)=0
c) 4x2+4x+1=0
d) \(\dfrac{2x}{3}-3\left(7-x\right)=\dfrac{4x-11}{8}\)
e) \(\dfrac{5\left(x-3\right)}{2}-\dfrac{4}{3}=\dfrac{3\left(x-1\right)}{4}+6\)
f) \(\dfrac{2}{3x}-\dfrac{1}{2x}=\dfrac{3}{4x^2}\)
g) \(\dfrac{2}{x-3}=\dfrac{1}{x+2}\)
h)\(\dfrac{3}{x+3}-\dfrac{1}{x-2}=\dfrac{5}{2\left(x+3\right)}\)
a) x-dfrac{dfrac{x}{2}-dfrac{3+x}{4}}{2}dfrac{2x-dfrac{10-7x}{3}}{3}-left(x-1right)
b) x^2-6x-2+dfrac{14}{x^2-6x+7}0
c) dfrac{8x^2}{3left(1-4x^2right)}dfrac{2x}{6x-3}-dfrac{1+8x}{4+8x}
d) dfrac{13}{left(2x+7right)left(x-3right)}+dfrac{1}{left(2x+7right)}dfrac{6}{x^2-9}
e) left(1-dfrac{2x-1}{x+1}right)^3+6left(1-dfrac{2x-1}{x+1}right)^2dfrac{12left(2x-1right)}{x+1}-20
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a) \(x-\dfrac{\dfrac{x}{2}-\dfrac{3+x}{4}}{2}=\dfrac{2x-\dfrac{10-7x}{3}}{3}-\left(x-1\right)\)
b) \(x^2-6x-2+\dfrac{14}{x^2-6x+7}=0\)
c) \(\dfrac{8x^2}{3\left(1-4x^2\right)}=\dfrac{2x}{6x-3}-\dfrac{1+8x}{4+8x}\)
d) \(\dfrac{13}{\left(2x+7\right)\left(x-3\right)}+\dfrac{1}{\left(2x+7\right)}=\dfrac{6}{x^2-9}\)
e) \(\left(1-\dfrac{2x-1}{x+1}\right)^3+6\left(1-\dfrac{2x-1}{x+1}\right)^2=\dfrac{12\left(2x-1\right)}{x+1}-20\)
Baif 1 : giải phương trình
a. dfrac{x-23}{24}+dfrac{x-23}{25}dfrac{x-23}{26}+dfrac{x-23}{27}
b. left(dfrac{x+2}{98}+1right)+left(dfrac{x+3}{97}+1right)left(dfrac{x+4}{96}+1right)left(dfrac{x+5}{95}+1right)
c. dfrac{x+1}{2004}+dfrac{x+2}{2003}dfrac{x+3}{2002}+dfrac{x+4}{2001}
d. dfrac{201-x}{99}+dfrac{203-x}{97}+dfrac{205-x}{95}+30
e.dfrac{x-45}{55}+dfrac{x-47}{53}dfrac{x-55}{45}+dfrac{x-53}{47}
f. dfrac{x+1}{9}+dfrac{x+2}{8}dfrac{x+3}{7}+dfrac{x+4}{6}
h. dfrac{2-x}{2002}-1dfrac{1-x}{2003}...
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Baif 1 : giải phương trình
a. \(\dfrac{x-23}{24}+\dfrac{x-23}{25}=\dfrac{x-23}{26}+\dfrac{x-23}{27}\)
b. \(\left(\dfrac{x+2}{98}+1\right)+\left(\dfrac{x+3}{97}+1\right)=\left(\dfrac{x+4}{96}+1\right)\left(\dfrac{x+5}{95}+1\right)\)
c. \(\dfrac{x+1}{2004}+\dfrac{x+2}{2003}=\dfrac{x+3}{2002}+\dfrac{x+4}{2001}\)
d. \(\dfrac{201-x}{99}+\dfrac{203-x}{97}+\dfrac{205-x}{95}+3=0\)
e.\(\dfrac{x-45}{55}+\dfrac{x-47}{53}=\dfrac{x-55}{45}+\dfrac{x-53}{47}\)
f. \(\dfrac{x+1}{9}+\dfrac{x+2}{8}=\dfrac{x+3}{7}+\dfrac{x+4}{6}\)
h. \(\dfrac{2-x}{2002}-1=\dfrac{1-x}{2003}-\dfrac{x}{2004}\)
g. \(\dfrac{x+2}{98}+\dfrac{x+4}{96}=\dfrac{x+6}{94}+\dfrac{x+8}{92}\)
Cho A = \(\left(\dfrac{1}{1-x}+\dfrac{2}{x+1}-\dfrac{5-x}{1-x^2}\right):\dfrac{1-2x}{x^2-1}\)
a) Rút gọn A.
b) Tìm x để A > 0
GIẢI CÁC PHƯƠNG TRÌNH SAU:
a, \(\dfrac{315-x}{101}+\dfrac{313-x}{103}+\dfrac{311-x}{105}+\dfrac{309-x}{107}+4=0\)
b, \(\dfrac{x-a}{a-4}+\dfrac{x+a-1}{a+4}+\dfrac{x-a}{16-a^2}=0\)
c, \(\dfrac{x-b-c}{a}+\dfrac{x-c-a}{b}+\dfrac{x-a-b}{c}=3\)
d, \(\dfrac{x-1}{a-1}+\dfrac{1-x}{1+a}-\dfrac{2x-1}{1-a^4}=\dfrac{2a^2\left(x-1\right)}{a^4-1}\)
1) giải phương trình :
a) left(2+3right)left(dfrac{3x+8}{2-7x}+1right)left(x-5right)left(dfrac{3x+8}{2-7x}+1right)
b) dfrac{7x+10}{x+1}left(x^2-x-2right)-dfrac{7x+10}{x+1}left(2x^2-3x-5right)0
c) dfrac{2x+5}{x+3}+1dfrac{4}{x^2+2x-3}-dfrac{3x-1}{1-x}
d) dfrac{13}{2x^2+x-21}+dfrac{1}{2x+7}+dfrac{6}{9-x^2}0
i) dfrac{x-49}{50}+dfrac{x-50}{49}dfrac{49}{x-50}+dfrac{50}{x-49}
k) dfrac{1+dfrac{x}{x+3}}{1-dfrac{x}{x+3}}3
Đọc tiếp
1) giải phương trình :
a) \(\left(2+3\right)\left(\dfrac{3x+8}{2-7x}+1\right)=\left(x-5\right)\left(\dfrac{3x+8}{2-7x}+1\right)\)
b) \(\dfrac{7x+10}{x+1}\left(x^2-x-2\right)-\dfrac{7x+10}{x+1}\left(2x^2-3x-5\right)=0\)
c) \(\dfrac{2x+5}{x+3}+1=\dfrac{4}{x^2+2x-3}-\dfrac{3x-1}{1-x}\)
d) \(\dfrac{13}{2x^2+x-21}+\dfrac{1}{2x+7}+\dfrac{6}{9-x^2}=0\)
i) \(\dfrac{x-49}{50}+\dfrac{x-50}{49}=\dfrac{49}{x-50}+\dfrac{50}{x-49}\)
k) \(\dfrac{1+\dfrac{x}{x+3}}{1-\dfrac{x}{x+3}}=3\)
1. giải pt :
a) \(\dfrac{1}{x-3}+2=\dfrac{5}{x-1}+x\)
b)\(\dfrac{2}{x^2+4x-21}=\dfrac{3}{x-3}\)
c) \(\dfrac{1}{x^2+2x+3}+4=\dfrac{1}{x^2+1}\)
d) \(\dfrac{2x+1}{2x-1}-\dfrac{2x-1}{2x+1}=\dfrac{8}{4x^2-1}\)
e) \(\dfrac{3x-1}{x-1}-\dfrac{2x+5}{x+3}+\dfrac{4}{x^2+2x-3}=1\)
23 tháng 1 2021 lúc 22:02
Giải phương trìnha,dfrac{x-3}{5}6-dfrac{1-2x}{3}b,dfrac{3x-2}{6}-5dfrac{3-2left(x+7right)}{4}c,3left(x-1right)+35xd,dfrac{x+1}{100}+dfrac{x+2}{99}dfrac{x+3}{98}+dfrac{x+4}{97}e,dfrac{59-x}{41}+dfrac{57-x}{43}+dfrac{55-x}{45}+dfrac{53-x}{47}-4f,dfrac{x-90}{10}+dfrac{x-76}{12}+dfrac{x-58}{14}+dfrac{x-36}{16}+dfrac{x-15}{17}15Em mới học về pt nên chưa quen lắm mọi người giúp e với ạ !Nguyễn Việt Lâm Quản lý
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Giải phương trình
\(a,\dfrac{x-3}{5}=6-\dfrac{1-2x}{3}\)
\(b,\dfrac{3x-2}{6}-5=\dfrac{3-2\left(x+7\right)}{4}\)
\(c,3\left(x-1\right)+3=5x\)
\(d,\dfrac{x+1}{100}+\dfrac{x+2}{99}=\dfrac{x+3}{98}+\dfrac{x+4}{97}\)
\(e,\dfrac{59-x}{41}+\dfrac{57-x}{43}+\dfrac{55-x}{45}+\dfrac{53-x}{47}=-4\)
\(f,\dfrac{x-90}{10}+\dfrac{x-76}{12}+\dfrac{x-58}{14}+\dfrac{x-36}{16}+\dfrac{x-15}{17}=15\)
Em mới học về pt nên chưa quen lắm mọi người giúp e với ạ !Nguyễn Việt Lâm Quản lý