Answer:
4
Step-by-step explanation:
To simplify , multiply the numerator/ denominator by
=
= 4
Answer:
With what?
Step-by-step explanation:
X<4 AND x>1
1<x<4
so the domain is from 1 to 4 but (1 and 4) are not included.
Answer:
The complex number has Cartesian form
.
Step-by-step explanation:
First, we need to recall the definition of when is a complex number:
.
Then,
. (I)
Now, recall the definition of the complex exponential:
.
So,
(we use that .
Thus,
Now we group conveniently in the above expression:
.
Now, substituting this equality in (I) we get
.
Thus,
.
Answer:
see the explanation
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
we have
Let
------>
------>
------>
------>
so
the common difference between consecutive terms is equal to 5
we can rewrite the formula as
-----> given formula
For n > 1
where
an is the term that you want to find (position n)
a(n-1) is the known term position (n-1)
Find a_8
For n=8
I need to know a_7
or
we know that
The general formula for arithmetic sequence is equal to
where
an is the term that you want to find (position n)
a_1 is the first term
d is the common difference
n is the number of terms
we have
substitute
so
For n=8