for 10 . substitute x in f(x) as 8-4x and x in g(x) as 10x-1
thats the way u find composite of fn
'Kay, doing college algebra, I've done most of these myself but I'm stuck on these. My teacher sadly doesn't have help time whenever I'm out of class. If I could get an explanation, that would be great. The book doesn't help, it just gets very technical with math terminology when I'm already very bad at it, lol.
4.Using the function, f(x)=8-x, find the following.
a)f(x+h)
b)f(x+h)-f(x)
c)f(x+h)-f(x)
------------
h
I know, for example f(x+h)-f(x) using f(x)=5-x was -h, but I don't understand how its simplifies to just one letter. =/
10.Find (f o g)(x) and (g o f)(x) [That o is that really small circle symbol I don't have a key for.]
f(x)=10x-1, g(x)=8-4x.
11.For the given functions, find (f o g)(x) and (g o f)(x) and the domain of each.
f(x)=3x+1, g(x)=square root of x
I'm not clear exactly what your question is.
You know what "f(x)= 8- x" means don't you? f(a)= 8- a, f(y)= 8- y, and f(x+ h)= 8- (x+ h)4.Using the function, f(x)=8-x, find the following.
a)f(x+h)
So f(x+ h)- f(x)= 8+ (x+ h)- (8+ x). Simplify by clearing the parentheses.b)f(x+h)-f(x)
[quote]c)f(x+h)-f(x)
------------
h[/quot
[tex]\frac{f(x+h)- f(x)}{h}= \frac{8+ (x+h)- (8+ x)}{h}
f(x+ h)- f(x)= (5- (x+h))- (5- x). Simplify that.I know, for example f(x+h)-f(x) using f(x)=5-x was -h, but I don't understand how its simplifies to just one letter. =/
Do you know what "f o g" means? What is its definition?10.Find (f o g)(x) and (g o f)(x) [That o is that really small circle symbol I don't have a key for.]
f(x)=10x-1, g(x)=8-4x.
11.For the given functions, find (f o g)(x) and (g o f)(x) and the domain of each.
f(x)=3x+1, g(x)=square root of x