You start a chain email and send it to six friends. the next day, each of your friends forwards the email to six people. the process continues for a few days.

Solution:

The following information about the chain email can be Written as follows:

1 Person Email →→6 Persons (E-mail) →6² Persons  (E-mail)→6³ Persons  (E-mail)+.........few Days

As you can see the number of email sent starting from person 1 to 6 persons to 36 persons to 216 persons, forms a Geometric pattern.

So, Sum of the Series = 1 + 6 + 36 + 216 + 1296 +......+  for n days

        =

Formula for n terms of a geometric series

For, Common ratio (r)≥1

Sum of above geometric series up to n terms

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

1) is right

step-by-step explanation: