$A.1+10x+100x^2+1000x^3+10000x^4+$cdots :

$Is$ this a geometric series?

$A.$ Yes

$B.No$

$If$ this $is$ a geometric series, enter

the first term:

and the ratio between successive terms:

$(Enterna$ for the first term and ratio $if$ this $is$ not a geometric series.$)$

$B.10x^5+10x^6+10x^7+10x^8+$cdots :

$Is$ this a geometric series?

$A.$ Yes

$B.No$

$If$ this $is$ a geometric series, enter

the first term:

and the ratio between successive terms:

$(Enterna$ for the first term and ratio $if$ this $is$ not a geometric series.$)$

$C.10+\frac{10}{2}+\frac{10}{3}+\frac{10}{4}+$cdots :

$Is$ this a geometric series?

$A.$ Yes

$B.No$

$If$ this $is$ a geometric series, enter

the first term:

and the ratio between successive terms: