3 years ago

Find the sum of the first 5 terms of a GP 1/7 + 2/7 + 4/7

Mathematics

1 answer:

Stels [109]3 years ago

7 0

Answer:

2 is the value of the infinite sum.

Step-by-step explanation:

3/2 = 2 - 1/2 7/4 = 2 - 1/4 15/8 = 2 - 1/8 and so on; the sum is 2

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3 years ago

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3 years ago

For what values of a are the following expressions true?/a+5/=-5-a

katovenus [111]

Explanation:

The expression is given below as

$|a+5|=-5-a$

Concept:

We will apply the bsolute rule below

$\begin{gathered} if|u|=a,a>0 \\ then,u=a,u=-a \end{gathered}$

By applying the concept, we will have

$\begin{gathered} \lvert a+5\rvert=-5-a \\ a+5=-5-a,a+5=5+a \\ a+a=-5-5,a-a=5-5 \\ 2a=-10,0=0 \\ \frac{2a}{2}=\frac{-10}{2},0=0 \\ a=-5,0=0 \end{gathered}$

Hence,

The final answer is

$a\leq-5$

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1 year ago

Find the sum of the first 5 terms of a GP 1/7 + 2/7 + 4/7​

Find the sum of the first 5 terms of a GP 1/7 + 2/7 + 4/7