( +3x? - 2x?) (-5x2 + x) = ( +3x* - 2x} }(-5x2)+(x* +3x3 - 2x? )(x) is an example
of:

(** +3x? - 2x?) (-5x2 + x) = (** +3x* - 2x} }(-5x2)+(x* +3x3 - 2x? )(x) is an example of:

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Ответ:

judyd452

04.02.2020

Mathematics

$a_{n}=7n-10$

Step-by-step explanation:

Givens

$a_{1}=-3\\a_{n}=a_{n-1} +7$

The formula to find the iterative rule of an arithmetic sequence is

$a_{n}=a_{1}+(n-1)d$

Where d=7 and $a_{1}=-3$ , replacing these values, we have

$a_{n}=-3+(n-1)7\\ a_{n}=7n-7-3\\ a_{n}=7n-10$

Therefore, the right answer is the first choice: $a_{n}=7n-10$

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