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Free_Kalibri [48]
4 years ago
11

Evaluate the geometric series: a1 =-1, r= 2, n= 7

Mathematics
1 answer:
Alex73 [517]4 years ago
3 0

Answer:

Common Ratio: 2

Step-by-step explanation:

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For what values of a does the equation a+x= 1+xa^2 have no solution?
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Answer:

We have the equation

a+x= 1+xa^2

we leave the terms with x on the left side of the equation and the independent terms on the right side.

x-xa^2=1-a\\(1-a^2)x=1-a\\

resolving for x we have that

x=\frac{1-a}{1-a^2}

Since we need that the equation doesn't have solution, then it is necessary that the denominator of x be 0 and this occur when 1-a^2=0\\1=a^2\\a=\pm1

Then, for a=\pm1 the equation hasn't solution

7 0
3 years ago
The diameter of a circle is 6 km what is the circles area
tankabanditka [31]
The area of the circle will be 28.27 km.
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3 years ago
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23/50 of Zanders friends prefer to stay home on Friday night what percent of Xander's friends prefer to stay home on Friday nigh
koban [17]

Answer:

46%  of Xander's friends prefer to stay home on Friday nights.

Step-by-step explanation:

Formula

Percentage = \frac{Part\ value\times 100}{Total\ value}

As given

\frac{23}{50}\ of\ Zanders\ friends\ prefer\ to\ stay\ home\ on\ Friday\ night.

i.e

Zanders friends prefer to stay home on Friday night = 23

Total numbers of Zanders friends are 50.

Part value = 23

Total value = 50

Put in the formula

Percentage = \frac{23\times 100}{50}

Percentage = \frac{2300}{50}

Percentage = 46%

Therefore 46%  of Xander's friends prefer to stay home on Friday nights.

3 0
3 years ago
Rewrite 128 in an expomential notion using 2 as a base
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3 years ago
There are 26 students in a 5th grade class. Five of these students will be
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Answer: 5 ways

Step-by-step explanation:

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