Question

4 . 2^x - 3 = 125

 

Answer 1

\(4\cdot2^x-3=125\)
\(\Rightarrow4\cdot2^x=125+3\)
\(\Rightarrow4\cdot2^x=128\)
\(\Rightarrow2^x=128:4\)
\(\Rightarrow2^x=32\)
\(\Rightarrow x=5\)

Answer 2

\(\Leftrightarrow4.2^x=125+3=128\)

\(\Leftrightarrow2^x=128:4=32\)

\(\Rightarrow x=5\)

Answer 3

các bạn cho mik hỏi sao tự nhiên 2^x = 32 xong x = 5 v