Let the function f be defined by y = f(x), where x and f(x) are real numbers.

Find the following. (Simplify your answers completely.) f(x)=3/7x+5
f(2) =
f(−3) =
f(k) =
f(k2 − 1) =

Question

Let the function f be defined by y = f(x), where x and f(x) are real numbers. 
 
Find the following. (Simplify your answers completely.) f(x)=3/7x+5
f(2)  =     
f(−3)  =   
f(k)  =    
f(k2 − 1)  =

anonymous · Answer

f(2) = 3/7(2)+5
=3/14+5
=73/14


similarly
f(-3) = 3/7(-3)+5
=3/-21 +5
=-102/-21
=102/21

f(k) = (3+35k)/7

f(k$^{2}$) = (3+35k$^{2}$)/7

anonymous · Answer

is this $$f(x)=\frac{3}{7x+5}$$

anonymous · Answer

if so then 
$$f(2)=\frac{3}{7\times 2+5}=\frac{3}{19}$$

anonymous · Answer

and likewise 
$$f(-3)=\frac{3}{7\times -3+5}=-\frac{3}{16}$$\]