I need this so bad please hel Let an denote the nth term of a geometric sequence. Let a0= 256 and an+1=
0.5an
Part A
Write an explicit formula for this sequence.
256(0.5)
Part B
To the nearest whole number, what is the sum of the first 25 terms?

answer:   c ?

step-by-step explanation:

ιт ωαѕ 5¢м вє¢αυѕє 1/4 σf 20 ιѕ 5

αи∂ 5*4=20

нσρє ι ¢συℓ∂ нєℓρ уσυ

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb