Question

Need help with this problem, Please explain. Screenshot below!

Answer 1

i tried to do it myself but I don't understand what i'm supposed to do. I need help with an explanation for it please!

Answer 2

@satellite73 hey if you could help with this i'd be really greatful! I have a test tomorrow on these materials and i'm trying to learn this and other questions so i can do it!

Answer 3

sure
from the table,what is \(f\) when \(x=2\)?

Answer 4

7?

Answer 5

A table? Are you (zack) going to post it?

Answer 6

no not 7? but 7!!

Answer 7

and what is \(g\) when \(x=2\)?

Answer 8

its the screenshot below my original question @mathmale

G would be -2!

Answer 9

so f=7 g=-2

Answer 10

yes

Answer 11

to to get \((f+g)(2)\) add those two numbers

Answer 12

because what \((f+g)(2)\) means is \(f(2)+g(2)\)

Answer 13

((7)(2))+((-2)(2))=(14)(4)

Answer 14

56?

Answer 15

oh no i see your confusion

Answer 16

it is this \[f(2)+g(2)\] do not multiply anything

Answer 17

(7)(2)+(-2)(2)?

Answer 18

it is much easier than you are making it
you have \[f(2)=7\\
g(2)=-2\]so \[f(2)+g(2)=7+(-2)\]that is all
`

Answer 19

OH!

Answer 20

easy right?

Answer 21

so therefore the answer would be... 5?

Answer 22

yes it would

Answer 23

wanna try \((f-g)(4)\)?

Answer 24

Thank you! So will i do that for all the other equations i have to evaluate using this??

Answer 25

Sure!

Answer 26

yes that is what you have to do
for B, evaluate the functions, then subtract

Answer 27

so that would be... (11-6)(4)

Answer 28

stop multplying !!

Answer 29

it is not "times" it is "of"
f of four minus g of four

Answer 30

f(4)+g(4)=11-6?

Answer 31

bingo

Answer 32

so then the answer would be 5

Answer 33

the less you do, the better it is

Answer 34

yes

Answer 35

so i gotta stop trying to multiply and read it as of

Answer 36

yup
wanna try the next one?

Answer 37

yes! ill try and get this one right!

Answer 38

(fg)(-2)=((0)(5))-2

Answer 39

do we multiply this one?

Answer 40

yes, but you do not subtract two
just \(0\times 5\)

Answer 41

so why dont we subtract the 2 like we did the other ones? as the answer is 0.

Answer 42

we did not subtract the two in the other ones
here is a quick example
if \(f(5)=7,g(5)=2\) hten \[(f+g)(5)=7+2\\
(f-g)(5)=7-2\\
(fg)(5)=7\times 2\\
\frac{f}{g}(5)=\frac{7}{2}\]

Answer 43

oh the -2 in the first one is the actual number! ok that one confused me! lemme try the last one and see if i get it right.

Answer 44

ok

Answer 45

(f/g)(0) f=3, g=0

Answer 46

therefore

Answer 47

...

Answer 48

(f/g)(0)=(3/0)=0?

Answer 49

the \(\frac{3}{0}\) is right
the \(0\) is wrong

Answer 50

3/0=..... nothing?

Answer 51

not a number, you cannot divide by zero

Answer 52

3/0 = blackhole

Answer 53

i tried it once, had a headache for a week

Answer 54

so how would i input that as an answer?

Answer 55

cant help you there

Answer 56

got it!

Answer 57

Thanks for the help!!!

Answer 58

yw

Answer 59

i have another type of question ill make another post! i have a few types... im trying to learn so i know what im doing.

Answer 60

kk