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xenn [34]
4 years ago
6

Find the sum of a 9-term geometric sequence when the first term is 4 and the last term is 1024?

Mathematics
1 answer:
nlexa [21]4 years ago
8 0
The common ratio is 2, so the sum is
.. a1*(r^n -1)/(r -1)
.. = 4*(2^9 -1)/(2 -1)
.. = 4*511
.. = 2044

The sum of the sequence is 2044.
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alexandr402 [8]
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Decimal: 0.21
8 0
3 years ago
Write as an expression: a number that is equal to twice as much as x
lesantik [10]

Let's call the number we're looking for y. We know that y is twice as much as x.


Twice as much as a number simply means the double of that number, and in turn the double of a number means to muliply that number by 2.


So, in order to obtain y, you have to multply x by 2. In formula, you have


y = 2\cdot x or simply y = 2x

5 0
3 years ago
Which real world situation cannot be represented by X +8 equals X 2+4
AlekseyPX
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6 0
3 years ago
C^2-4=0 what are both solutions
Assoli18 [71]
The solutions are C = 2 and C = -2

We can find this by solving for C. 

C^2 - 4 = 0 ----> add 4 to both sides
C^2 = 4 ----> Take the square root of both sides
C = 2

However, since we used the square root function, we have to include a negative form of the answer as well as the positive one we found. 
6 0
3 years ago
Why are arithmetic sequences discrete data?
schepotkina [342]

Answer:

If you take any number in the sequence then subtract it by the previous one, and the result is always the same or constant then it is an arithmetic sequence.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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