Question

If f(x) = 2x, then f -1(x) =


a.-2x
b.½x
c.x - 2

Answer 1

ans is b

Answer 2

what about:
If g(x) = 3x - 5, then g -1(x)=

a. x+5/3

b. x/3 +5

c. 3x + 5

Answer 3

ans is a

Answer 4

do you want explanation or just answers??!! ;)

Answer 5

sure can you explain

Answer 6

yes for sure.. here is the method

put y=f(x)

we get y=3x-5

now solve for x

add 5 to both sides we get

y+5=3x

divide by 3 both sides and then we have

x=y+5/3

now remember we had y=f(x)

so taking inverse of both sides we get
f^-1(y)=x

now put value of x
we get
f^-1(y)=y+5/3

now replace y by x

we get f^-1(x)=x+5/3 :)

Answer 7

thanks a lot can you help with this one?

Let R={0, 1, 2, 3} be the range of h(x) = x - 7. The domain of h inverse is

a.{-7, -6, -5, -4}
b.{7, 8, 9, 10}
c.{0, 1, 2, 3}

Answer 8

wait a sec

Answer 9

its easy you just have to remember that range of h(x)=domain of h^-1(x)
so your ans is c

Answer 10

thanks alot

Answer 11

you are most welcome..!!