Mathematics: In an arithmetic sequence, find a50 when a1=7 and d=5 a. 495 b. 252 c. 275 d. 349

In an arithmetic sequence, find a50 when a1=7 - id50173162494, selfiegymnast

Ответ:

landsjr69

06.01.2022

An arithmetic sequence is an ordered list of numbers where the next number is found by adding the same amount to the number before. (2,5,8,11... is one where you add 3 to get the next number)
The equation for arithmetic sequence is
$A_{n} = A_{1} +(n-1)d$
where $A_{n}$ is the "n th" number in the sequence
( $A_{1}$ is the first number in the sequence)
d is the number you add to get the next number

$A_{n} = A_{1} +(n-1)d$
$A_{50} = 7 +(50-1)(5)$
$A_{50} = 7 +(49)(5)$
$A_{50} = 7 +245$
$A_{50} =252$

The answer is B. 252

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In an arithmetic sequence, find a50 when a1=7 and d=5
a. 495
b. 252
c. 275
d. 349

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