SOLUTION: PLEASEEE HELPPP !!! 1. What is the recursive formula for the sequence -2, 1, 4, 7 2. For the function f(x)=√x-8, find a. f(11) b. f(-a)

Algebra ->  Equations -> SOLUTION: PLEASEEE HELPPP !!! 1. What is the recursive formula for the sequence -2, 1, 4, 7 2. For the function f(x)=√x-8, find a. f(11) b. f(-a)      Log On


   

Question 913851: PLEASEEE HELPPP !!!
1. What is the recursive formula for the sequence -2, 1, 4, 7
2. For the function f(x)=√x-8, find
a. f(11)
b. f(-a)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
1. What is the recursive formula for the sequence -2, 1, 4, 7
2. For the function f(x)=√x-8, find
a. f(11)
b. f(-a)
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1. What is the recursive formula for the sequence -2, 1, 4, 7


We're adding 3 each time (eg: -2 --> 1 is +3 since -2+3 = 1)

So the recursive formula is

This formula essentially states: to get the nth term , we add 3 to the previous term

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2. For the function f(x)=√x-8, find
a. f(11)
b. f(-a)

a)

I'm assuming the function is f%28x%29+=+sqrt%28x-8%29

f%28x%29+=+sqrt%28x-8%29

f%2811%29+=+sqrt%2811-8%29

f%2811%29+=+sqrt%283%29

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b)

f%28x%29+=+sqrt%28x-8%29

f%28-a%29+=+sqrt%28-a-8%29


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Thanks,

Jim