If $a,b$ and $c$ respectively the $p$th, $q$ th and $r$ th terms of a GP, then the value of 
$\left(q-r\right)\log a+\left(r-p\right)\log b+\left(p-q\right)\log c$is

Write the first three terms of the sequence: ${\mathrm{a}}_{\mathrm{n}}=5\mathrm{n}+3$

Write the first three terms of the sequence: ${\mathrm{a}}_{\mathrm{n}}=3{\mathrm{n}}^2-2$.

Write the first three terms of the sequence: ${\mathrm{a}}_{\mathrm{n}}=\frac{\mathrm{n}-3}{2}$.

Write the first four terms in the list of numbers defined by:

${\mathrm{a}}_{\mathrm{n}}=2\mathrm{n}+3$

Write the first four terms in the list of numbers defined by:

${\mathrm{a}}_{\mathrm{n}}={\left(-1\right)}^{\mathrm{n}-1}{\mathrm{n}}^4$.

Write the first four terms of the sequence defined by:

${\mathrm{a}}_{\mathrm{n}}=\frac{{\left(\mathrm{n}-1\right)}^2}{3}$.

Does the following form an A.P? Justify your answer.

$1,1,2,2,3,3,.........$

Does the following form an A.P? Justify your answer.

$\sqrt{3},\sqrt{12},\sqrt{27},\sqrt{48},..........$