If

is the common difference between terms in the sequence

, then



...

You're told that

(the sum of the first 16 terms in the sequence, presumably). Well, we know that


Recall that

so that we have

So we get
answer will be 2÷18=9
and the answer is 9
please mark this answer as brainlist
Answer: Maturation
Step-by-step explanation:Internal validity is a type of validity that establishes a cause and effect relationship,this type of validity tries to eliminate alternative explanation for a Discovery.
One of the threats to internal validity is MATURATION.
MATURATION is the type of threat occuring during experiment to prove a particular Discovery as shown by the question where the police officer shot and killed someone against the intention of the experiment.
Answer:
NOPE
Step-by-step explanation:
You just need to isolate it, hope this explains it