The 15th term of the sequence 23, 19 15,... is -33.
What is the 15th term of the sequence?
23, 19, 15......
First term, a = 23
Common difference, d = Second term - first term
= 19 - 23
= -4
15th term= a + (n - 1)d
= 23 + (15 - 1)-4
= 23 + (14)-4
= 23 + (-56)
= 23 - 56
= -33
Hence, 15th term equals negative 33