tim 45% cua 72kg tim x , biet 12,5% cua x la 0,15tan
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tim x biet x+34 la boi cua x+1 tim x biet 2x+1 la uoc cua x+82
tim x biet x+10 la boi cua x+1
tim x biet 2x+1 la uoc cua x+82
Bạn Nguyễn Đoan Hạnh cho mình bổ sung nhé
Ư(9)={+-1;+-3;+-9}
Nếu x+1=-1 => x=-2
Nếu x+1=-3 => x = -4
Nếu X+1=-9 => x = -10
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x+10 la boi cua x+1
suy ra (x+1)+9 la boi cua x+1
suy ra 9 la boi cua x+1
U(9)={1;3;9}
Neu x+1=1 thi x=0
Neu x+1=3 thi x=2
Neu x+1=9 thi x=8
Vay x thuoc {0;2;8}
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tim x dua vao quan he uoc boi:tim so tu nhien x sao cho x-1 la uoc cua 12tim so tu nhien x sao cho 2x+1 la uoc cua 28tim so tu nhien x sao cho x+15 la boi cua x+3tim cac so nguyen x,y sao cho (x+1)(y-2)3tim so nguyen x sao cho(x+2).(y-1)2tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180tim so nguyen to x,y biet x+y12 va UCLL (x:y)5tim so tu nhien x,y biet x+y32 va UCLL (x:y)8tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100x150tim so x nho nhat khac 0b biet...
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tim x dua vao quan he uoc boi:
tim so tu nhien x sao cho x-1 la uoc cua 12
tim so tu nhien x sao cho 2x+1 la uoc cua 28
tim so tu nhien x sao cho x+15 la boi cua x+3
tim cac so nguyen x,y sao cho (x+1)(y-2)=3
tim so nguyen x sao cho(x+2).(y-1)=2
tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180
tim so nguyen to x,y biet x+y=12 va UCLL (x:y)=5
tim so tu nhien x,y biet x+y=32 va UCLL (x:y)=8
tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100<x<150
tim so x nho nhat khac 0b biet x chia het cho 24 va 30
40 chia het cho x . 56 chia het cho x va x>6
Tim nghiem cua f(x) = (x-1)(x+3). Tim gia tri a,b cua g(x) = x3 - ax2 + bx -3. Biet nghiem cua f(x) cung la nghiem cua g(x)
tim x biet x+34 la boi cua x+1
tim x biet 2x+1 la uoc cua x+82
NHANH LEN NHE
tim x biet x+34 la boi cua x+1
tim x biet 2x+1 la uoc cua x+82
NHANH LEN NHE
x+34 chia hết cho x+1
=> (x+34)-(x+1) chia hết cho x-1
=> 33 chia hết cho x-1
=> x-1= 1;-1;33;-33;11;-11;3;-3
=> x= 2;0;34;-32;12;-10;4;-2
x+82 chia hết cho x+82
=> 2x + 164 chia hết cho x+82
=> (2x+164)-(2x+1) chia hết cho 2x+1
=> 163 chia hết cho 2x+1
=> 2x+1 = 1;-1;163;-163
=> x = 0; -1; 81;-82
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Tim x y thuoc z biet x binh phuong la boi cua x + 3 , x + 3 la boi cua x binh phuong
tim 1 so biet rang 45% cua so do hon 30% cua so do la 300 don vi
45% - 30% = 15%
Số đó là: 300 : 15% = 2000
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tim x nguyen biet |x^2-2|+|2-x^2|=28. tim cac gia tri nguyen cua x thoa man la