If f(x)= 2x/ x-7
then determine the value of f^-1(4). Explain or show how you
Arrived

answer: about 22.67

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x

the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.