Question

1.a)3^x . 2=54

b)x^10=x

c)(2x+1)^3=64

Answer 1

\(a.3^x.2=54\Leftrightarrow3^x=27\Leftrightarrow3^x=3^3\Leftrightarrow x=3\)

\(c.\left(2x+1\right)^3=64\Leftrightarrow\left(2x+1\right)^3=4^3\)

\(\Leftrightarrow2x+1=4\Leftrightarrow x=\dfrac{3}{2}\)

Answer 2

a: =>3^x=27

=>x=3

b: =>x(x^9-1)=0

=>x=0 hoặc x=1

c: =>2x+1=4

=>2x=3

=>x=3/2