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sertanlavr [38]
4 years ago
10

What is the first term in a geometric sequence if the common ratio is −2 and the sum of the first five terms is 77?

Mathematics
1 answer:
kirza4 [7]4 years ago
5 0
Answer is a1 = 7

Using equation (derived from formula to find sum of values in a geometric series),
77 \:  =  \frac{a(1 - (  { - 2}^{5}))}{1 - ( - 2)}
Hence, solve for a.
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Can you help me plssss
Shtirlitz [24]
The answer is -6 i hope this helps you
5 0
3 years ago
Question 1(Multiple Choice Worth 2 points)
Alexxandr [17]

Answer:

Hello! Your answer here is 10−5.

Step-by-step explanation:

To convert 0.00001 to a power of 10, we use scientific notation<em>. </em>Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.

In this problem, the given decimal number is 0.00001. We must move the decimal 5 places to the right, which gives us 1.0.

Then, we multiply 1.0 by 10 raised to the negative of the number of places we have moved the decimal point - so we multiply 1.0 by 10−5, which gives us our answer:

10−5

6 0
2 years ago
-1/6,5/3,-5/6 least to greatest
Phantasy [73]

Hi There

The first thing you must do is divide the numerator by their denominator

-1/6 = -0.16

5/3= 1.16

-5/6= -0.83

Now we can see which one is the greatest and least

-0.83 < -0.16 < 1.16 ( That's the answer)

Now you might asking yourself why -0.83 is lest than -0.16 ?

Well the reason is because when the negative number is farter zero.. it is lest than the one that near to the zero. So that's why


I hope that's help and if you have questions please let me know :)

4 0
3 years ago
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How to calculate the area of a triangle??
Artemon [7]

1/2base×height ====> is how you do this properly

5 0
4 years ago
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Is the following relation a function<br> {(-1,1),(0,3),(-1,5),(2,7)}
Mama L [17]

A function is when the y value doesn't repeat.  the x can repeat infinitely but the y can not to be a function.

The y value is the second number in each set and it doesn't repeat so this IS a function

5 0
4 years ago
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