Posted by christin on Sunday, October 20, 2013 at 3:42pm.
how do i calculate this
if f(x)= 3x+1 and g(x)=x+2
find (f+g)(x) and calculate (f+g)(1)
a little confused can some one please help me thank you

algebra functions  Steve, Sunday, October 20, 2013 at 5:12pm
(f+g) just means to add f and g. Since they're both functions of x, that's why the unfamiliar notation.
(f+g)(x) = f(x)+g(x) = (3x+1)+(x+2) = 4x+3
so, (f+g)(1) = 4(1)+3 = 7
or, you could evaluate f(1)+g(1) = 4+3
Answer This Question
Related Questions
 Algebra  I am very confused about functions. I think if I could see this ...
 algebra functions  how do i calculate this if f(x)= 3x+1 and g(x)=x+2 find (fg...
 Functions  I have to find the domain and range for the composite of functions G...
 Chemistry  pH  Calculate the pH of each of the following solutions: a) .35 M ...
 Grade 12 Advanced Functions  One zero of f(x)=x^3+4x^2+x+c is 3. a) calculate ...
 Chemistry  Can someone please explain how to convert this, sadly I was absent ...
 algebra help  I am really confused on this question can some one help me out ...
 Math ( composite functions )  I need some help with composite functions where ...
 Grammar  I'm a little confused with this question about infinitives and ...
 math  The application of one function followed by the application of a second ...
More Related Questions