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Alex Ar [27]
3 years ago
14

Write -2 + 4 + -8 + ...+ 64 +-128 in sigma notation. Then determine the sum.

Mathematics
1 answer:
Grace [21]3 years ago
4 0
It would be -70. Your welcome
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Which expressions represent the distance between the two points? Choose all answers that are correct. The number line shows two
FrozenT [24]
In a number line, the distance between the points is the absolute value of their difference. For this given, the distance between points in negative 9 and 13 is the absolute value of -9 minus 13. Thus, the answer is letter A. 
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Will give brainlest answer pls help!
mojhsa [17]
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8 0
4 years ago
X2 =5. What is the answer for X
grin007 [14]

Answer:

x=2.5

Step-by-step explanation:

First, you do 5 divided by 2, because you are trying to find a missing factor. After that, your answer, which is 2.5, is what x equals.

Hope that helps!

7 0
4 years ago
Read 2 more answers
Find the sum of the first five terms using the geometric series formula for the sequence left curly bracket 1 half comma space m
MatroZZZ [7]

Answer:

\bold{\dfrac{11}{2 }}

Step-by-step explanation:

Given the geometric series:

\{\dfrac{1}2, -1, 2, -4,  ..... \}

To find:

Sum of series upto 5 terms using the geometric series formula = ?

Solution:

Formula for sum of a n terms of a geometric series is given as:

S_n=\dfrac{a(1-r^n)}{1-r} \ \{r

a is the first term of the geometric series

r is the common ratio between each term (2nd term divided by 1st term or 3rd term divided by 2nd term ..... ).

Here:

a = \dfrac{1}{2}

r = \dfrac{-1}{\dfrac{1}{2}} = -2

n=5

So, applying the formula for given values:

S_5=\dfrac{\dfrac{1}2(1-(-2)^5)}{1-(-2)} \\\Rightarrow S_5=\dfrac{1-(-32)}{2 \times 3} \\\Rightarrow S_5=\dfrac{1+32}{6} \\\Rightarrow S_5=\dfrac{33}{6} \\\Rightarrow \bold{S_5=\dfrac{11}{2}}

So, the answer is

\bold{\dfrac{11}{2 }}

3 0
4 years ago
Anyone can help me out on this? :)
Charra [1.4K]

Answer:

the answer is c, science CANNOT answer all questions

6 0
4 years ago
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