数列23减|3n减2|的最大项的值是多少

问题描述:

数列23减|3n减2|的最大项的值是多少

an = 23-|3n-2|
3n-2=0
n = 2/3 =1 ( n is integer )
max an = a1
= 23-|3-2|
= 22