3 years ago

Find the inverse of the function f(x)=x-7

Mathematics

1 answer:

gulaghasi [49]3 years ago

6 0

Answer:

$f^{-1}$ (x) = x + 7

Step-by-step explanation:

Let y = f(x) and rearrange making x the subject, that is

y = x - 7 ( add 7 to both sides )

y + 7 = x

change y back into terms of x, then

$f^{-1}$ (x) = x + 7

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Luda [366]

Take the natural log of both sides

ln(2^x)=ln(.125)
Xln(2)=ln(.125)
X=ln(.125)/ln(2)
X=-3

ALTERNATIVE ROUTE:
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And 1/2^3 is also equal to 1/8
So since you need the reciprocal to match it the exponent is a negative

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3 years ago

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dybincka [34]

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3 years ago

Solve x3 = 160.<br> help

Bad White [126]

Answer: 5.43

Step-by-step explanation:

Given :

$x^{3} = 160$

To find x , we will find the cube root of both sides , that is

$x = \sqrt[3]{160}$

$x = 5.428835233$

$x$ ≈ 5.43

5 0

3 years ago

One grain of the sand weighs 0.0006g , write the weight of one grain of sand in standard form

Luba_88 [7]

I hope this helps you

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3 years ago

Please answer ASAP!! Thank you in advance, and remember to wash your hands consistently for 1 minute with antibacterial soap.

nalin [4]

Answer: t= 15

Step-by-step explanation:

1/4t= 3 3/4

Make 3 3/4 as an improper fraction:

15/4

Multiply:

t= 15/4 x 4/1

=60/4

t=15

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3 years ago