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diamong [38]
3 years ago
12

A geometric sequence has an initial value of 2 and a common ratio of 3. Which formula would be more practical to use if you were

looking find the value of the 19th number in the sequence?
Mathematics
1 answer:
Makovka662 [10]3 years ago
8 0

Answer:

19th term = ar^18

19th term = 774,840,978

Step-by-step explanation:

First term, a = 2

Common ratio, r = 3

nth term of a geometric sequence = ar^(n-1)

19th term = ar^(19-1)

19th term = ar^18

= 2 × 3^18

= 2 × 387,420,489

= 774,840,978

19th term = 774,840,978

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2800 ml +2.6 L<br> 2800 ml +2.6 L
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Answer:

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Step-by-step explanation:

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5 0
3 years ago
Cos^-1(-x)=-Cos^-1x for -1&lt;x&lt;1 TRUE OR FALSE?
VMariaS [17]

We are given

cos^{-1}(-x)=-cos^{-1}(x)

Firstly, we will simplify left side

and we will check whether it is equal to right side

Left side:

Let's assume y left side expression

y=cos^{-1}(-x)

now, we can take cos on both sides

cos(y)=cos(cos^{-1}(-x))

we can simplify it

cos(y)=-x

Right side:

Let's assume y left side expression

y=-cos^{-1}(x)

Multiply both sides by -1

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now, we can take cos on both sides

cos(-y)=cos(cos^{-1}(x))

we can simplify it

cos(-y)=x

cos(y)=x

we can see that

both sides cos(y) value is different

so, this is FALSE.........Answer

5 0
3 years ago
Read 2 more answers
I need help because I'mnot Smart and don't know how to do this.​
Galina-37 [17]

Answer:

Area= 480 because 8x6x10=480

Perimeter= 24 because 8+6+10=24

Step-by-step explanation:

5 0
3 years ago
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I need help with this asap!!
cupoosta [38]

Answer:

perimeter you add all sides together:

5x+2 +5x+2 +x +8 +x+8

12x +20

and for Area you multiply:

(x + 8)(5x + 2)

5x^2 + 2x + 40x +16

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so your answer is the first one or "A"

3 0
3 years ago
The table shows the atomic radii of four elements.
RideAnS [48]

\sf Potassium \ : \  2.2 * 10^{-7}

\sf Argon \ : \ 7.1  *   10^{-8}

\sf Boron \ : \ 8.5 * 10^{-8}

\sf Silver \ : \ 1.6 * 10^{-7}

greatest to least :

  • Potassium < Silver <  Boron < Argon
7 0
2 years ago
Read 2 more answers
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