If a, b, c are the ${\mathrm{p}}^{\mathrm{th}}, {\mathrm{q}}^{\mathrm{th}}, {\mathrm{r}}^{\mathrm{th}}$ terms in H.P. then $\left|\begin{array}{ccc}\mathrm{bc}& \mathrm{p}& 1\\ \mathrm{ca}& \mathrm{q}& 1\\ \mathrm{ab}& \mathrm{r}& 1\end{array}\right|$=

best study material, now at your finger tips!

• 

  live classes

• 

  progress tracking

• 

  24x7 mentored guidance

• 

  study plan analysis

download the app