Question

The general term of a sequence is given by an = -4n + 15. Is the sequence an
A.P.? If so, find its 15th term and the common difference.​

Answer 1

Answer:

common difference = - 4

and this is an AP

1. Step-by-step explanation's

Answer 2

Answer:

SOLUTION

Put n= 1,2,3... we get

=) 11,7,3.......

This series is AP

first term a= 11

common difference (D)= -4  

15th term= a+(n-1)d

=) 11+14×(-4)

=) 11-56

=) -45 (15th term)

hope it helps ✔️