Maybe 10 or something i dont know im only 10 so i cant really answer that i just need points
We are asked to simplify the expression
,
what we do is, we form a single fraction where the numerator is the product of the numerators, and the denominator is the product of the denominators, that is:
simplify the common numbers and terms in the numerator and denominator:
Answer:
I believe the 4th one
an=145+an-1 and a1=20