B(1)=15 b(n)=b(n-1)•(-3) what is the 4th term in the sequence

-405

Step-by-step explanation:

The first term is b(1) = 15.

The second is b(2) = 15(-3), or -45.

The third is b(3) = -45(-3) = +135.

The fourth is b(4) = +135(-3) = -405.

17.08

correct me if i am wrong.

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