a) |a| = 0
=> a = - 2 hoặc a = 2
|a + 2| = 0
a + 2 = 0
a= 0 - 2
a = -2
a,|a|=2
=>a=2 hoặc a=-2
b,|a+2|=0
=>a+2=0
=>a=0-2
=>a=-2
A ) = - 2 hoặc 2
B ) = - 2
tick mình đi ! thanks
a) |a| = 0
=> a = - 2 hoặc a = 2
|a + 2| = 0
a + 2 = 0
a= 0 - 2
a = -2
a,|a|=2
=>a=2 hoặc a=-2
b,|a+2|=0
=>a+2=0
=>a=0-2
=>a=-2
A ) = - 2 hoặc 2
B ) = - 2
tick mình đi ! thanks
Tim so nguyen x,y biet
a) (x+5) mu 2 + (2y - 8 ) mu 2 = 0
b)(x + 3).(2y - 1 ) = 5
a, Cho ( a,b) = 1 . Chung minh rang (a.b, a+b)=1
b, Cho (a,b)= 1. Tim UCLN (11a+2b , 18a +5b)
C,, Cho A = m+n ; B=m^2+n^2.Trong do m va n la cac so tu nhien nguyen to cung nhau. Tim UCLN (A,B)
d, Tim cac so tu nhien n sao cho n^3 - n^2 + n-1la so nguyen to
A=n-1/n+2
a, Voi gia tri nao thi A la phan so
b, Tim so nguyen n de A=0
c,tim so nguyen n de A co gia tri nguyen
cho a va b la cac so tu nhien khac 0 sao cho trong 4 cau sau a+1 chia het cho b . a=2b+5. a+b chia het cho 3 . a+7b la so nguyen to co 3 cau dung 1 cau sai .tim a,b
Trong 3 so a,b,c co 1 so nguyen a,1 so nguyen duong va1 so bang 0
tim 3 so do biet :IaI=b^2(b-c)
Tim so nguyen a,biet:
|a-2|=0
tim so nguyen a, biet
a. | a | = 2
b. | a + 2 | = 0
tim so nguyen a sao cho [a^2-1][a^2-5][a^2-10]<0
tim 2 so nguyen to a va b biet a^2-b^2-1=0