Answer:
they're all like terms so we just add and subtract
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Answer: The critical value of the test is 2.807.
Step-by-step explanation:
Since we have given that
n = 24
So, the degree of freedom v = n-1 = 24 - 1=23
Since, n>30, so we will use 't-test'.
Here, α = 0.01
so, According to t-table, we get that
If we take α, then we are taking about two tail test.
If we take then we are talking about one tail test.
But in both the cases, the result will be same.
Hence, the critical value of the test is 2.807.
Answer:
The sum is
Step-by-step explanation:
we know that
The formula of the sum in a geometric sequence is equal to
where
a1 is the first term
r is the common ratio
n is the number of terms
we have
a1=-4, a2=24, a3=-144
Find the value of r (common ratio)
r=a2/a1
r=24/(-4)=-6
so
a1=-1
r=--6
n=6
substitute in the formula