Question

3 + 2 ^{x -1} =24 ­–[4² – {2²  - 1}]

Answer 1

\(3+2^{x-1}=24-\left[4^2-\left(2^2-1\right)\right]\) (sửa đề)

\(\Rightarrow3+2^{x-1}=24-\left[16-\left(4-1\right)\right]\)

\(\Rightarrow3+2^{x-1}=24-\left(16-3\right)\)

\(\Rightarrow3+2^{x-1}=24-13\)

\(\Rightarrow3+2^{x-1}=11\)

\(\Rightarrow2^{x-1}=11-3\)

\(\Rightarrow2^{x-1}=8\)

\(\Rightarrow2^{x-1}=2^3\)

\(\Rightarrow x-1=3\)

\(\Rightarrow x=3+1=4\)

Vậy \(x=4.\)

#\(Toru\)

Answer 2