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$A$ and $B$ possess unequal dimensional formula then following operation is not possible in any case:-
  • A$log (A -B)$
  • B$sin (A + Bx)$
  • C$e^{(AB)}$
  • D$\tan \left[ {\frac{A}{B}\left( {\frac{B}{A}n} \right)} \right]$
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