Question

what do i do to determine 1/f(x) when F(x)={(3,5),(2,4),(1,7)}

Answer 1

:0

Answer 2

function f(x) maps a set of x values in to other set of values(say 'y'). that means y = f(x);
3->5 (for x=3 -> y=5)
2->4(for x=2 -> y=4)
1->7(for x=1 -> y=7)
.To determine inverse of f(x) just reverse the direction of mapping and reverse the ordered pairs. i.e. f^-1(x)={(5,3),(4,2),(7,1)}

Answer 3

this was the problem asking for inverses:
http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4e3379210b8ba7b2da41ca25
this one is asking for:
\[\frac{1}{f(x)}\]

Answer 4

yeah i still dont understand

Answer 5

for this problem, we need to figure out what:
\[\frac{1}{f(x)}\]
is.
So lets start from the beginning.
Can you tell me what f(3) is?

Answer 6

yeah its 5

Answer 7

Right, so now check this out:
\[\frac{1}{f(3)} = \frac{1}{5}\]
Does that make sense?

Answer 8

it seems Joe had already explained similar problem to you. One needs to do lot of practise to learn mathematics.

Answer 9

does F(x) signify anti-derivative by any chance?

Answer 10

yes it does make sense

Answer 11

yep, its all practice practice practice:)

Answer 12

thanks again

Answer 13

its notation as well. learning all the notation helps. I was thinking inverses at first too.

Answer 14

but then i remember that last prblem. notation was different.

Answer 15

@Bliss: anti-derivative!!!. these lads are not even thorough with basics of functions. forget about derivatives and anti-derivatives for the time being.

Answer 16

oh ok