Question

Which function below is the inverse of f(x) = x2 − 25?

x squared over 25

±square root of the quantity x plus 25

±5 times the square root of x

1 over quantity x squared minus 25

Answer 1

if i did the math correctly the answer is D

Answer 2

optioN B

Answer 3

what did u get @Morgan27, i was drawn between B and D

Answer 4

I got b

Answer 5

oh ok, haha sorry, @zaibali.qasmi is correct

Answer 6

Lol its okay :)

Answer 7

I wasnt sure about it either

Answer 8

yea, those problems are tricky

Answer 9

Do you think you could help me with one more? :)

Answer 10

sure!

Answer 11

given the function f(x)=6(x+2)-3 solve for the inverse function when x=21
A.-45
B.0
C.2
D.63

Answer 12

ok
Step 1: Replace f(x) with y.
Step 2: Interchange x with y.
Step 3: Solve for y.

If this y is a function, it is the inverse of the original function.

If this y is NOT a function, there is no inverse.

Step 4: If f has an inverse function, then replace y with f inverse.

ok lets walk thru this problem

first lets rearrange the problem.
Given the function f(x) = 6(x+2) − 3

f(x)= 6x+12 -3 = 6x+9
Step 1
y=6x+9
step 2
x=6y+9
step3
can you solve for y?

Answer 13

y=1/6x-3/2 ?

Answer 14

yes!