+0  
 
0
159
1
avatar+1227 

If f(1)=5, f(2)=8  and \(f(x)=ax+bx+2\)  , what is the value of f(3)?

tertre  Jun 2, 2017
Sort: 

1+0 Answers

 #1
avatar+79853 
+2

 

We have the following system

 

a(1)  + b(1)  + 2  =  5

a(2)  + b(2)  + 2  = 8      simplify

 

a   + b   =   3      

2a + 2b  =  6     →   a + b  = 3    

 

Since  we have  two equal equations, we have infinite answers  for a and b

 

For instance...if   a  = 1, then b  = 2

 

And  our function becomes

 

f(x) =  x  + 2x  + 2    =    3x + 2

 

Then  f(3)   =  3(3) + 2   =  11

 

Maybe you meant that   f(x)  = ax^2 + bx + c        ???

 

 

 

cool cool cool

CPhill  Jun 2, 2017

11 Online Users

avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details