3 years ago

Need help with this math problem asap, please help 5 POINT Reward!

Mathematics

1 answer:

arsen [322]3 years ago

8 0

Answer is C.

Multiply the numerator and denominate by 3 - √5

Hope it helps.

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The recursive rule for a sequence is shown.an=an−1+9a1=21 what is the explicit rule for this sequence?

bixtya [17]

Answer:

Meaning of Explicit rule , is the general rule for a sequence.

The given sequence is defined as,

$a_{n}=a_{n-1}+9a_{1}-21$ ----(1)

Common Difference(d) of an airthmetic Sequence= N th term - (N-1) th term

$=a_{n}-a_{n-1}\\\\=a_{n-1}-a_{n-2}$

Equation 1 can be written as,

$a_{n}-a_{n-1}=9 a_{1}-21\\\\ d =9a_{1}-21$

General rule or explicit rule for this sequence is given as:

$a_{n}=a_{1} +(n-1)d\\\\a_{n}=a_{1}+(n-1)(9a_{1}-21)\\\\a_{n}=a_{1}+9na_{1}-21 n-9a_{1}+21\\\\a_{n}=-8a_{1}+21+n(9a_{1}-21)$

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andrew11 [14]

It’s b. you divide by 5 on both sides and at the end you’ll get x= 6

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Answer:

1/3

Step-by-step explanation:

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Step-by-step explanation:

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