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3 years ago

What is the sum of the n terms of the series 4 + 12 + 36 + 108 + . . . ?

1 answer:

8 0

Sum of n terms of a geometric series is
Sn = a1 (r^n-1)/(r-1)
a1 = 1st term = 4
r = common ratio = 12/4 = 3
so, the sum is
Sn = 4 (3^n-1)/(3-1) = 2(3^n-1)

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Triangle M is also a scaled copy of S. The scale

kozerog [31]

Answer:

I believe it’s 2/3

Step-by-step explanation:

If s to m is 3/2 then m to a should be 2/3 not 100% sure though

4 0

3 years ago

Who know the correct answer to this

miskamm [114]

y = -x + b

Plugging in the point

-13 = -7 + b

-6 = b

Answer: -6

8 0

3 years ago

Divide (x^3+2x-6x-9) by (x+3)

GenaCL600 [577]

Answer:

x² - 3x + 5 - [24÷(x+3)]

Step-by-step explanation:

1. Expand (x³ + 2x - 6x - 9)

= x³ - 4x - 9

2. Divide [x³ - 4x - 9 by x+3]

= x² + [(-3x^2-4x-9) ÷ (x+3)]

3. Divide [(-3x^2-4x-9) by (x+3)]

= -3x + [(5x-9) ÷ (x+3)]

x² - 3x + [(5x-9) ÷ (x+3)]

4. Divide [(5x-9) ÷ (x+3)]

= 5 + [(-24) ÷ (x+3)]

x² - 3x + 5 + [(-24) ÷ (x+3)]

= x² - 3x + 5 - [24 ÷ (x+3)]

7 0

2 years ago

Solve for V:<br><br>V+9/15=0

astraxan [27]

V= 0.4

9/15=0.6

0.6+0.4=0

8 0

3 years ago

Add the following rational number =<br> 3/11 and -5/12

tatiyna

Answer:

-19/132

Step-by-step explanation:

To add fractions, find the lowest common multiple of the two denominators and multiply accordingly to make both denominators the same. In this case, the lowest common multiple of 11 and 12 is 132, so we need to multiply the first number by 12 and the second by 11. So we get $\frac{36}{132} + (-\frac{55}{132} )$ = $\frac{36-55}{132}$ = $\frac{-19}{32}$ $-\frac{19}{132}$

4 0

3 years ago