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3 years ago

I need help asap I don't get this

1 answer:

4 0

The correct answer is C. They are going down by 3.

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vaieri [72.5K]

Answer: 105 is your sum.

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3 years ago

swat32

Answer:

Step-by-step explanation:

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3 years ago

Alexxx [7]

Answer:

see explanation

Step-by-step explanation:

The n th term of a geometric sequence is

$a_{n}$ = a $(r)^{n-1}$

where a is the first term and r the common ratio

Given $a_{12}$ = $\frac{1}{32}$ and r = $\frac{1}{2}$ , then

a $(\frac{1}{2}) ^{11}$ = $\frac{1}{32}$ , that is

$\frac{a}{2^{11} }$ = $\frac{1}{32}$

$\frac{a}{2048}$ = $\frac{1}{32}$ ( cross- multiply )

32a = 2048 ( divide both sides by 32 )

a = 64 ← first term

Thus the explicit formula is

$a_{n}$ = 64 $(\frac{1}{2}) ^{n-1}$

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3 years ago

Veronika [31]

B.) (x^6-2)/(x^-4 + 3)

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3 years ago

Svet_ta [14]

$9x^2-9=9(x^2-1)=9(x-1)(x+1)$

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3 years ago