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zlopas [31]
3 years ago
11

Which formula can be used to find the nth term in a geometric sequence where a1=3 and r=2 ?

Mathematics
2 answers:
egoroff_w [7]3 years ago
8 0
1st term =a₁ = 3,  r=2

1st a₁   = 3 x 2⁰
2nd a₂  = 3 x 2¹
3rd a₃  =  3 x 2²
4th a₄   = 3 x 2³
5th a₅   = 3 x 2⁴
.......................
.......................
nth : a(n) = 3 x 2⁽ⁿ-¹)
Note when that the subscript of a is the same as the exponent mines 1
shusha [124]3 years ago
7 0
A(n)=a(1)*r^(n-1)

a(n)=3*2^(n-1)

Hope I don't mess up for your sake.
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Answer:

1

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Step-by-step explanation:

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9 = 3 x 3 = 3²

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25 = 5 x 5 = 5²

36 = 6 x 6 = 6²

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4 0
3 years ago
Find the equation of a line parallel to y=-10x-5 passing through the coordinate (-3,5)
Allushta [10]
With a given parallel line and a given point on the line
we can use the point-line method:  y-y0=m(x-x0)
where
y=mx+k is the given line, and
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Here
m=-10, k=-5, (x0,y0)=(-3,5)

=> the required line L is given by:
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on simplification
L: y=-10x-30+5
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4 years ago
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4 years ago
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WITCHER [35]

Answer:

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Step-by-step explanation:

  1. (2x³ - 3x + 11) - (3x² + 1) x (4 - 8x)
  2. 2x³ - 3x+11 - (12x² - 24x³ + 4 - 8x)
  3. 2x³ - 3x + 11 - 12x² + 24x³ - 4 + 8x
  4. 26x³ + 5x + 7 - 12x²

= 26x³ - 12x² + 5x + 7

4 0
3 years ago
An expression is shown below.<br><br><br> What is the value of the expression?
dsp73

Answer:

Step-by-step explanation:

First you need to set up the equation 2/3+1/4/1/2, and we know that there is a stratgey for dividing fractions as well. But first, we need to find the least common fator for 2/3 and 1/4 which is twelve which would be 8/12+3/12 which is 11/12 and 11/12 dividing by 1/2 is 22/12 since all you need to do is do the keep change flip method which would give you an answer of 1 10/12 or 1 5/6

6 0
3 years ago
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