a, 2x . 4 = 128
b, x15 = x 1
c, (2x + 1)3 = 125
d, (x – 5)4 = (x - 5)6
e, x10 = x
f, (2x -15)5 = (2x -15)3
Tìm x
a) ( 2x -1)+3/15= 3/2
b) x+ 46/15= 1,5
c) ( -2x +1) + 3/15= 5/3
d) -13/3 -2x -1= 0,6
e) 3x -1/2x = 7/2-3
f) x÷5=6÷7
g) 2x-1/3 = 16/3
Tìm x ∈ N biết:
a) x 10 = 1 x
b) x 10 = x
c) ( 2 x - 15 ) 5 = ( 2 x - 15 ) 3
(2x-15)^5=(2x-15)^3
(2x-15)5=(2x-15)3
a,(2x - 15)5=(2x - 15)3
b,(x + 3)4=2401
c,(x-5)3=1
( 2x - 15 ) ^ 5 = ( 2x -15 ) ^ 3
(2x-15)^5=(2x-15)^3
Bài 1:
a, (2x-15) 5 = (2x-15)3
b, 2x+9 chia hết 3x+7