+0  
 
0
228
2
avatar

2x^2-x+5,g(x)=x+1

find (f+g)(x) and (f+g)(6)

Guest Oct 29, 2014

Best Answer 

 #2
avatar+80785 
+5

2x^2-x+5,g(x)=x+1    assuming that the first function is f(x)

[f+g](x) means that we just add the functions together  = 2x^2 + 6

[f + g](6)  means that we "plug" 6 into what we've just found in the first part......so we have...... 2(6)^2 + 6  = 2(36) + 6 = 72 + 6 = 78

 

CPhill  Oct 29, 2014
Sort: 

2+0 Answers

 #1
avatar+17705 
+5

f(x)  =  2x² - x + 5                 g(x)  =  x + 1

(f + g)(x)  =  f(x) + g(x)  =   (2x² - x + 5) + (x + 1)  =  2x² + 6

(f + g)(6)  = 2(6²) + 6  =  78

geno3141  Oct 29, 2014
 #2
avatar+80785 
+5
Best Answer

2x^2-x+5,g(x)=x+1    assuming that the first function is f(x)

[f+g](x) means that we just add the functions together  = 2x^2 + 6

[f + g](6)  means that we "plug" 6 into what we've just found in the first part......so we have...... 2(6)^2 + 6  = 2(36) + 6 = 72 + 6 = 78

 

CPhill  Oct 29, 2014

8 Online Users

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