Consider the sequence 2, 5, 10, 17, ...
2 answers:
A4 means the 4th number
so it is 17
Answer:
The answer is 
Step-by-step explanation:
we have the sequence

Let
a1-----> the first term
a2----> the second term
a3----> the third term
a4----> The fourth term
In this problem we have




therefore
the answer is

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