This image shows a square pyramid.
What is the surface area of this square
pyramid?

A = a^2 + 2a * √((a^2)/4 + h^2)

Step-by-step explanation:

This is the overall formula because I don't see the attachment for any pyramid

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

answer:

what is your question that you ask

step-by-step explanation: