Question

find a under n for the following geometric sequence. a ubder 1 =5,r = - 2. so a under n = ( ) n-1.

Answer 1

[AI-generated answer — Explain Bot]

To find a sub n, the nth term of a geometric sequence given a sub 1 and the common ratio, you can use the formula:

a sub n = a sub 1 * r^(n-1)

In this case, a sub 1 is given as 5 and r is given as -2. Plugging these values into the formula, we get:

a sub n = 5 * (-2)^(n-1)

Therefore, a sub n is equal to 5 times negative 2 raised to the power of n-1.