3 years ago

The geometric sequence shown can be represented by the function y = 5n, where the domain of the function is

Mathematics

1 answer:

alukav5142 [94]3 years ago

3 0

The answer is all real numbers

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PLEASE HELP

Semenov [28]

Answer:

$\sum\limits^7_{n=1}(4n - 3)$

Step-by-step explanation:

Given

$1 + 5 + 9 + .....$

Required

Write a definition

First, we derive a formula for the series using:

$T_n = a + (n - 1)d$

From the attached data;

$a = 1$

$d = 5 - 1 = 4$

So:

$T_n = a + (n - 1)d$

$T_n = 1 + (n - 1) * 4$

$T_n = 1 + 4n - 4$

Collect like terms

$T_n = 4n - 4+1$

$T_n = 4n -3$

So, the definition for first 7 terms is:

$\sum\limits^7_{n=1}(4n - 3)$

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Answer:

Step-by-step explanation:

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Step-by-step explanation:

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