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PolarNik [594]
3 years ago
6

Evaluate the series 8+4+2+...​

Mathematics
1 answer:
Akimi4 [234]3 years ago
8 0

Answer:

16

Step-by-step explanation:

a/(1 - r)  

= 8/0.5  

= 16

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Which quadratic equation has solutions x=8 and x=−1?
andrezito [222]
There are two ways you can do this

Using the formula


{x}^{2}  - (sum \: of \: roots)x + poduct \: of \: roots = 0

{x}^{2}  - (8+-1)x +  - 1 \times 8 = 0


{x}^{2}  - 7x  - 8 = 0


Working backwards


x = 8 \: or \: x =  - 1
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