Question

Tìm x

a) ( 2x + 1 )³ = - 0,001

b) ( 2x + 1 )⁵  = ( 2x + 1 )²⁰¹⁶

Giúp mk vs, mk ko wên ơn dou! Help me...

Answer 1

a) (2x + 1)^3 = -0,001

(2x + 1)^3 = (-0,1)^3

=> 2x + 1 = -0,1

2x = -0,1 -1

2x = -1,1

x = (-1,1) : 2

x = -0,55

Vậy x = .......

Answer 2

giúp mk, mk k cho

Answer 3

b) (2x + 1)^5 = (2x + 1)^2016

=> 0 = (2x + 1)^2011

=> 2x + 1 = 0

2x = 0 - 1

2x = -1

\(x=-\frac{1}{2}\)

Vậy x = ......

Answer 4

tks caitlyn so much