Tìm x, y \(\in\)Z+ sao cho :
3x + 1 = ( y + 1 )2
Help me !!!! If someone helps me, i wil tick him three tick !!!
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Viết 1 đoạn văn về làng quê bằng tiếng anh
Mau nha!help me!if someone helps me,I will thank you and tick your answer
Phu Long is my village. every day, Phu Long is very busy but Phu Long is exciting village.
my family live here since I was three years old. Phu Long has a lot of beautiful flower.Phu Long has a lots of many primary school.
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Thế này mình cx làm đc.Nhưng mình cần dài hơn,bài mà dành cho HSG đó kìa
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tim z,y,z sao cho x/y+z+1=y/x+z+1=z/y+x+1=x+y+z
giúp mình đi mình đang cần gấp lắm tối nay phải nộp rồi
HELP ME CHO 3 TICK
tìm cực trị:y=(1-x)^3(3x-8)^2
help me!!!
Tìm x và y thuộc Z biết
a)4x-y=8
b)3x+y=-5
HELP ME, ai trả lời đúng và đầy đủ mình sẽ tick cho ^-^
=>4x-y-3x+y=8-(-5)=13
Hay x=13
=>3x=13x3=39
=>y=13-39=-26
Vậy x=13,y=-26
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3) Tìm các số nguyên x và y sao cho (x2 - x + 1)(y2 + xy) = 3x -1
Ai nhanh và đúng thì mình sẽ tick và add friends nhé. Thanks. Please help me!!!
a,Tìm a,b ∈ Z biết A (b+1) =3
b, tìm n ∈ Z sao cho 2n+7 ⋮ n+1
c, tìm x,y ∈ Z sao cho xy + x-y =6
\(\dfrac{help}{me}\)
a) \(a\left(b+1\right)=3\left(a;b\inℤ\right)\)
\(\Rightarrow a;\left(b+1\right)\in U\left(3\right)=\left\{-1;1;-3;3\right\}\)
\(\Rightarrow\left(a;b\right)\in\left\{\left(-1;-4\right);\left(1;2\right);\left(-3;-2\right);\left(3;0\right)\right\}\)
b) \(2n+7⋮n+1\left(n\inℤ\right)\)
\(\Rightarrow2n+7-2\left(n+1\right)⋮n+1\)
\(\Rightarrow2n+7-2n-2⋮n+1\)
\(\Rightarrow5⋮n+1\)
\(\Rightarrow n+1\in U\left(5\right)=\left\{-1;1;-5;5\right\}\)
\(\Rightarrow n\in\left\{-2;0;-6;4\right\}\)
c) \(xy+x-y=6\left(x;y\inℤ\right)\)
\(\Rightarrow x\left(y+1\right)-y-1+1=6\)
\(\Rightarrow x\left(y+1\right)-\left(y+1\right)=5\)
\(\Rightarrow\left(x-1\right)\left(y+1\right)=5\)
\(\Rightarrow\left(x-1\right);\left(y+1\right)\in U\left(5\right)=\left\{-1;1;-5;5\right\}\)
\(\Rightarrow\left(x;y\right)\in\left\{\left(-0;-6\right);\left(2;4\right);\left(-4;-2\right);\left(6;0\right)\right\}\)
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2) Cho các số x, y, z khác o. Biết rằng x(1/x + 1/y) + y(1/z + 1/x) + z(1/x + 1/y) = -2 và x3 + y3 + z3. Tính P = 1/x + 1/y 1/z
Ai nhanh và đúng thì mình sẽ tick và add friends nhé. Thanks. Please help me!!!
2004/2005*2005/2003*2003/2004
help me! Someone help me, I tick for you:ai giúp mình,mình tick cho
\(\frac{2004}{2005}\cdot\frac{2005}{2003}\cdot\frac{2003}{2004}=\frac{2004\cdot2005\cdot2003}{2005\cdot2003\cdot2004}=1\)
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\(\frac{2004x2005x2003}{2005x2003x2004}\)
Sau đó thì bạn chỉ cần rút gọn thui
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1.If I __________the same problem you had as a child, I might not have succeeded in life as well as you have.a. have B. would have C. had had D. should have2. I __________you sooner had someone told me you were in the hospital.a. would have visited B. visited C. had visited D. visit3. __________more help, I would call my neighbor.a. needed B. should I need C. I have needed ...
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1.If I __________the same problem you had as a child, I might not have succeeded in life as well as you have.
a. have B. would have C. had had D. should have
2. I __________you sooner had someone told me you were in the hospital.
a. would have visited B. visited C. had visited D. visit
3. __________more help, I would call my neighbor.
a. needed B. should I need C. I have needed D. I should need
4. __________then what I know yesterday, I would have saved myself a lot of time and trouble over the years.
a. had I known B. did I know C. If I know D. If I would know
5. Do you think there would be less conflict in the world if all people __________the same language?
a. spoke B. speak C. had spoken D. will speak
1.If I __________the same problem you had as a child, I might not have succeeded in life as well as you have.
a. have B. would have C. had had D. should have
2. I __________you sooner had someone told me you were in the hospital.
a. would have visited B. visited C. had visited D. visit
3. __________more help, I would call my neighbor.
a. needed B. should I need C. I have needed D. I should need
4. __________then what I know yesterday, I would have saved myself a lot of time and trouble over the years.
a. had I known B. did I know C. If I know D. If I would know
5. Do you think there would be less conflict in the world if all people __________the same language?
a. spoke B. speak C. had spoken D. will speak
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1.If I __________the same problem you had as a child, I might not have succeeded in life as well as you have.
a. have B. would have C. had had D. should have
2. I __________you sooner had someone told me you were in the hospital.
a. would have visited B. visited C. had visited D. visit
3. __________more help, I would call my neighbor.
a. needed B. should I need C. I have needed D. I should need
4. __________then what I know yesterday, I would have saved myself a lot of time and trouble over the years.
a. had I known B. did I know C. If I know D. If I would know
5. Do you think there would be less conflict in the world if all people __________the same language?
a. spoke B. speak C. had spoken D. will speak
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