Question

Write the explicit formula for the sequence with a1 = –4 and r = –7.

Answer 1

SO that is in which series??

Answer 2

a_n = 90 • 4^(n - 1) for n = 1, 2, ...

90, 360, 1440, ...

Answer 3

A.

an = –4 • (–7)n – 1

B.

an = –4 • 7–n – 1

C.

an = –(4 • 7)n – 1

D.

none of these

Answer 4

D

Answer 5

when r is given then the sequence is Geometric Progression because r represents common ratio
so
general term in GP would be
\[t _{n} = a1*r^{n-1}\]