What is the recursive rule for the sequence?

−7.4, −21.2, −35, −48.8, −62.6, ...

A) an = an+1 − 13.8, where a1 = −7.4

B) an = an−1 + 13.8, where a1 = −7.4

C) an = an+1 + 13.8, where a1 = −7.4

D) an = an−1 − 13.8, where a1 = −7.4

Jaleco
Mar 14, 2018

#1**+3 **

a1 is the first term = -7.4

the common difference between tems is -13.8

the an th term is the previous term + the common difference, so

an = a(n-1) + (-13.8) or an= a(n-1) - 13.8

ElectricPavlov
Mar 14, 2018