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3 years ago

Solve for x: Solve for x:

Mathematics

2 answers:

Delicious77 [7]3 years ago

8 0

Answer: x = 8

Step-by-step explanation: 8x +36 = 5x + 60

8x - 5x = 60-36

3x = 24

x = 24/3

x = 8

plz mark as Brainliest

Oksana_A [137]3 years ago

3 0

Answer:

x = 8

Step-by-step explanation:

He is correct just checking. Give him brainliest.

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2 years ago

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2 years ago

What is the first term in a geometric sequence if the common ratio is − 2 and the sum of the first six terms is −105?

Serggg [28]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
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\end{cases}$

$\bf -105=a_1\left( \cfrac{1-(-2)^6}{1-(-2)} \right)\implies -105=a_1\left( \cfrac{1-(64)}{1+2} \right)
\\\\\\
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\\\\\\
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2 years ago