The diagram shows rays of light from a point source, P, that reach a detector, D, along two paths. One path is a straight line,
while the other is bent by reflection off a mirror. What is the value of b, correct to one decimal place? Assume that all the points in the diagram lie in the same plane.
5.4
4.2
3.6
2.8
5.4
4.2
3.6
2.8
2 answers:
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Answer:
Step-by-step explanation:
we know that
In an <u><em>Arithmetic Sequence</em></u> the difference between one term and the next is a constant, called the common difference
The formula for an Arithmetic Sequence is equal to
where
d is the common difference
n is the number of terms
a_1 is the first term of the sequence
In this problem we have
substitute
so
<u><em>Find the first ten terms</em></u>
For n=2 ---->
For n=3 ---->
For n=4 ---->
For n=5 ---->
For n=6 ---->
For n=7 ---->
For n=8 ---->
For n=9 ---->
For n=10 ---->
The sequence is