tìm x biết x+0=0 (x khac 0)
áp dung tinh chat a^n=a^m suy ra m=n(a khac 0 ,a khac 1 )
tìm x thuộc N thỏa mãn:3+2x-01=11
hay chung minh x khac 0 khi x+y+z=0
tap hop D cac so tu nhien x(khac o) ma 0:x=0
x^2014:x(x khac 0)
x^5:x(x khac 0)
Bài 13: Tìm x biết: a) (x-2)(x-3)-D0. b) (x-3)(x-4)-0. c) (x-7)(6-x)=0. d) (x-3)(x-13)=0. The Bài 14: Tìm x biết: a) (12-x)(2-x)=0. b) (x-33)(11-x)=0. c) (21-x)(12-x)=0. d) (50-x)(x-150) =0. Bài 15: Tìm x biết: a) 2x +x = 45. b) 2x +7x = 918. c) 2x+3x 60+5. d) 11x+22x 33.2.
tim x thuoc N biet
a,3x:11=0
b,231-(x-6)=1339:13
c,x.(x-15)=0
d,(x-1).(x-20)=0
e,25:x=x (x khac 0)
f,2782:[216-(x-3) ]=13
viet cac phep chia duoi dang phan so
a) m : 4 ( m thuoc Z)
b) 5 : a ( a thuoc Z , a khac 0 )
c) x : y ( x, y thuoc Z, y khac 0)