What is the sum of an 8 term geometric sequence if the first term is -11, the last term is 180,224 and the common ratio is -4 -143,231
-36,047
144,177
716,144

3rd option

Step-by-step explanation:

The sum of n terms of a geometric sequence is

=

where a₁ is the first term and r the common ratio

Here a₁ = - 11 and r = - 4 , then

S₈ =

   =

   =

   =

   = 144177

pi x^2

step-by-step explanation:

pi times x squared