Teaching EMRS JSA (Junior Secretariat Assistant) Mock Test Series 2023 Quantitative Aptitude Simplification Surds and Indices
If \(\rm \left(\frac{a}{b}\right)^{x-1}=\left(\frac{b}{a}\right)^{x-3} \) then x = ?
1
\(\frac{7}{2}\)
2
\(\frac{5}{2}\)
3
2
4
-1