Which of the following are $\mathrm{A}\mathrm{P}\mathrm{s}$? If they form an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.
$1, 3, 9, 27, ...$
 

Does the following series form an $\mathrm{A}\mathrm{P}$? If it forms an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.
$a, 2a, 3a, 4a, ...$

Is the following an $\mathrm{A}\mathrm{P}$? If it is, then find the common difference $d\mathrm{}$ and write three more terms.
$a, a^2, a^3, a^4, ...$

Is the following sequence an $\mathrm{A}\mathrm{P}$? If it forms an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.

$\sqrt{2}, \sqrt{8}, \sqrt{18}, \sqrt{32}, ...$

Is the following sequence an $\mathrm{A}\mathrm{P}$? If it forms an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.
$\sqrt{3}, \sqrt{6}, \sqrt{9}, \sqrt{12}, ...$

Is the following sequence an $\mathrm{A}\mathrm{P}$? If it forms an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.

$1^2, 3^2, 5^2, 7^2, ...$

Is the following sequence an $\mathrm{A}\mathrm{P}$? If it forms an $\mathrm{A}\mathrm{P}$, find the common difference $d\mathrm{}$ and write three more terms.
$1^2, 5^2, 7^2, 73, ...$

Fill in the blanks in the following table, given that $a\mathrm{}$ is the first term, $d\mathrm{}$ the common difference and $a_n\mathrm{}$the $n\mathrm{t}\mathrm{h}$ term of the $\mathrm{A}\mathrm{P}$:

Fill in the blanks in the following table, given that $a\mathrm{}$ is the first term, $d\mathrm{}$ the common difference and $a_n\mathrm{}$the $n\mathrm{t}\mathrm{h}$ term of the $\mathrm{A}\mathrm{P}$