XY - X + 2Y -2 =X(Y-1) + 2(Y-1) = 2X(Y-1)
Answer:

Step-by-step explanation:
Therefore,
should be your final answer.
I hope this helps you
n=6.7/5
n =42/5
n=8,4
Answer:

Step-by-step explanation:
we have the sequence

we know that
In an <u><em>Arithmetic Sequence</em></u> the difference between one term and the next is a constant and this term is called a common difference
Let

we know that
----> 
----> 
The common difference is 2
This is an arithmetic sequence
The general formula for an arithmetic sequence is

where
d is the common difference
n is the number of terms
substitute the given values


