Which of the following choices is the explicit formula for the following geometric sequence?

-0.1, 0.02, -0.004, 0.0008, -0.00016

a. an = 0.1(0.2)n
b. an = 0.1(-0.2)n-1
c. an = -0.1(-0.2)n-1
d. an = 0.2(-0.2)n-1
e. an = -0.1(0.2)n-1

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v