Th1:x - 1 = 0 => x= 1
Th2: x - 10 = 0 => x = 10
Th3: x = 0
VẬy x thuộc {1;10;0}
Th1:x - 1 = 0 => x= 1
Th2: x - 10 = 0 => x = 10
Th3: x = 0
VẬy x thuộc {1;10;0}
Tim x thuoc so nguyen,biet:
a. (x+1).(x-2)=0
b.10+3(x-1)=10+6x
c. x-96=(9443-x)-15
Tim x thuoc Z
a}[x+1]+[x+2]+[x+3]+...............+[x+99]=0
b}[x-3]+[x-2]+[x-1]+.................+10+11=11
tim x cau 1: |x-2|=10
cau 2:15-x^2=-21 cau 3: x.(x+7)=0
Tim x thuộc Z
(X-3)+(x-2)+(x-1)+...+10+n=0
giup minh bai aoan lop6
tim x
5^x +5^x+1 +5^x+2 <10..0(18chu so 0) /2^18
1 )Tim x, y thuoc Z
x + y = x.y
2) Tim x thuoc Z
(x + 1)+(x+3)+(x+5)+...+(x+99)=0(x-3)+(x-2)+(x-1)+...+10+11=11-12(x-5)+7(3-x)=530(x+2)-6(x-5)-24x=100tim cac so nguyen x biet
a)(x2 - 10)(x2 - 25)<0
b)(x - 2)(x2 +1)=0
Tim x thuộc Z : (x2 + 1)(x2 - 10) < 0
Tim x
a) (x - 2) - (- 8) = - 137
b) 15 - ( - x + 18) = - 24
c) 12 - |x| = -19
d) 10 - |x + 3| = -4 - (- 10)
e) x .( x + 2) = 0
f) (x + 1) . ( x - 7)= 0
g) x2 + 2x = 0
h) ( 2x - 1) . ( x - 7 )= 0