C-04-Q055mediumsingle_mcqa−m⋅am=?a^{-m} \cdot a^m = ?a−m⋅am=?a000b111ca−m2a^{-m^2}a−ব্যাখ্যাBy the product rule the exponents add to zero: −m+m=0-m + m = 0−m+m=0, so a−m⋅am=a0=1a^{-m}\cdot a^m = a^0 = 1a−m⋅a.