An email spam reaches three readers. Each of them forwarded the same email to three different readers. Each of these new readers further forwarded the same email to three different readers, who each forwarded the same email to yet again three different readers. How many people have read that email? 81
120
243
363
2 answers:
Answer: Second Option is correct.
Step-by-step explanation:
Since we have given that
Number of readers = 3
Each of them forwarded the same email to number of readers = 3
So, our equation becomes
Similarly, each of them again forwarded the same email to number of readers = 3
So, our equation becomes
Again each of them forwarded the same email to number of readers = 3.
So, our equation becomes
So, Number of people have read that email is given by
Hence, Second Option is correct.
Answer:120
Step-by-step explanation:
3+9+27+81
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y = -2x^2 -4x +1
Step-by-step explanation:
y-3 = -2 (x+1)^2
Foil (x+1)^2
(x+1)(x+1) = x^2 +x+x+1 = x^2 +2x+1
Substitute this back in
y-3 = -2(x^2 +2x+1)
Distribute
y-3 = -2x^2 -4x -2
Add 3 to each side
y-3+3 = -2x^2 -4x -2+3
y = -2x^2 -4x +1
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