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natali 33 [55]
3 years ago
9

Which choice is the explicit formula for the following geometric sequence?0.5, -0.1, 0.02, -0.004, 0.0008, ...

Mathematics
1 answer:
Minchanka [31]3 years ago
6 0
a_1=0.5\\a_2=-0.1\\a_3=0.02\\a_4=-0.004\\a_5=0.0008\\\\a_n=a_1\cdot q^{n-1}\\\\q=a_2:a_1\to q=-0.1:0.5=-0.2\\\\a_n=0.5\cdot(-0.2)^{n-1}=0.5\cdot(-0,2)^n\cdot(-0.2)^{-1}\\\\=0.5\cdot(-0.2)^n\cdot(-5)=-2.5\cdot(-0.2)^n\\\\\boxed{a_n=-2.5\cdot(-0.2)^n}
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1
Mrrafil [7]

Answer:

3280

Step-by-step explanation:

52×63=3276

Round 3276 to 3280

Hope this helps! :)

3 0
3 years ago
What is the slope of the line threw (-9,6) and (-3, 9)
DerKrebs [107]

Slope = (y2-y1)/(x2 - x1)


Slope = (9 - 6)/(-3- (-9)) = 3/6 = 1/2


Answer: 1/2

4 0
3 years ago
Read 2 more answers
(3×+5)(2×+10)=<br> then x=
katen-ka-za [31]
X= -5/3 & x=5
I got this by using the quadratic formula.
8 0
3 years ago
The students who travels to 5 states visited 5 new states during a vaction.Does increasing the 5 to 10 change the median?
AnnZ [28]

Answer:

No because you can multiply 5 by 5

8 0
3 years ago
2(3x + 5) = 9x + 9 - 3x + 1​
ELEN [110]
2(3x+5)=9x+9-3x+1
(2)(3x)+(2)(5)=9x+9-3x+1
6x+10=9x+9-3x+1
6x+10=(9x-3x)+(9+1)
6x+10=6x+10
6x-6x+10=6x-6x+10
10=10
10-10=10-10
0=0
All real numbers are solutions.
3 0
3 years ago
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