3 years ago

Please help ASAP I am very dumb

Mathematics

2 answers:

JulijaS [17]3 years ago

6 0

Answer:

Step-by-step explanation:

igomit [66]3 years ago

4 0

Answer:

Step-by-step explanation:

calculate like terms, then it is pretty simple from there.

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How do I find the sum of this series?<br>Question D

raketka [301]

Sum of an infinite geometric sequence with the common ratio r, and the first term a1 is $\frac{a_1}{1-r}$

we notice
-2 times -1/4=1/2,
1/2 times -1/4=-1/8
so a1=-2
r=-1/4 or -0.25

so the sum is
$\frac{-2}{1-(-0.25)}$ =
$\frac{-2}{1+0.25}$ =
$\frac{-2}{1.25}$ =
$\frac{-8}{5}$ =
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3 years ago

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iogann1982 [59]

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3 years ago