If f(x) = 2x + 3 and g(x) = x^2 − 1, find the values of combining these functions. Match each combined function to its corresponding value.

(f + g)(2)
(f − g)(4)
(f ÷ g)(2)
(f × g)(1)
..............................
-4
10
0
7/3

Question

If f(x) = 2x + 3 and g(x) = x^2 − 1, find the values of combining these functions. Match each combined function to its corresponding value.

(f + g)(2)
(f − g)(4)
(f ÷ g)(2)
(f × g)(1)
..............................
-4
10
0
7/3

zzr0ck3r · Answer

$(f+g)(2)=f(2)+g(2)=(2*2+3)+(2^2-1)$

zzr0ck3r · Answer

Do something similar for the other ones.

zzr0ck3r · Answer

Does this makes sense @BrettRoss25 ?

brettross25 · Answer

idk

brettross25 · Answer

i dont get it

prathamesh_m · Answer

(f+g)(2) = f(2) + g(2)
Which means you simply substitute 2 in f(x) and g(x) to find f(2) and g(2). Then you add them to get (f+g)(2)

prathamesh_m · Answer

Similarly for (f x g)(2), you multiply instead of add and so on.

skullpatrol · Answer

The value of a function f at 2 is denoted by f(2). 

Any value of a function can be found by replacing the variable in the defining equation of the function by the given number. 

So replace the variable in your functions by 2 and then perform the operations asked for in the question.