Question

Tìm x biết :(-4)^x/64=-16

 

Answer 1

\(\frac{\left(-4\right)^x}{64}=-16\)

\(\Leftrightarrow\left(-4\right)^x=64.16\)

\(\Leftrightarrow\left(-4\right)^x=1024\)

\(\Leftrightarrow4^x=1024\)

\(\Leftrightarrow4^x=4^5\)

\(\Rightarrow x=5\)

Answer 2

\(\frac{\left(-4\right)^x}{64}=-16\)

\(\Leftrightarrow\left(-4\right)^x=64.16\)

\(\Leftrightarrow\left(-4\right)^x=1024\)

\(\Leftrightarrow4^x=1024\)

\(\Leftrightarrow4^x=4^5\)

\(\Rightarrow x=5\)

Vậy \(x=5\)