Calculate the indicated value of each function.
f(x)=–14x–13 and g(x)=–14x2–10x–14. Find f(13)–g(13).
f(x)=14x2+15x–11 and g(x)=10x+11. Find g(f(9)).
f(x)= 15−15x+14x2/28−x . Find f(8)
Responses (4)
This is fairly easy but difficult to explain.
So basically f(x)= 15−15x+14x2/28−x . Find f(8) translates to what is the y value when the x value is equal to 8.
So
f(8) = 15-15(8)+14(8)2/28-(8)
So basically just sub in 8 for every x on the right side of the equation to get the y value
How would you solve the ones with (f) and (g) and you explained the problem very well.
f(x) = -14x - 13
g(x)= -14x2-10x-14
f(13) = -14(13)-13 = -195
g(x)= -14x^2-10x-14
g(13) = -14(13)^2-10(13)-14
g(13) = -2366 - 130 -14
g(13) = -2910
...that number... wow depressing xp
so now you can bring the 2 answers down if you wish and make it easier
f (13) - g (13)
-195 - (-2910)
-195+2910
2715 ANSWER NUMBER ONE
f (x) = 14x^2 +15x -11
g(x) = 10x + 11
Find g(f(9))
So basically it is asking you to go and find the function at the point of 9 for f and then take that answer and put it in for g. Sounds difficult but stick with me.
f(9)=14(9)^2+15x-11
f(9)=14(81)+15(9)-11
f(9)=1134+135-11
f(9)=1258
I really hope that 14x2 is 14x^2... or so you mean...
g(1258) = 10(1258) + 11
G(1258) =12580 + 11
g(1258) = 12591
Also I can barley tell the differences between your multiplication and your x values. Please represent multiplication by "*"