ayeitscharis ayeitscharis

01-09-2016
Mathematics

contestada

Let f(x)=x^2 -81. Find f^1(x)

Respuesta :

01-09-2016

Hello,

I suppose you mean -1! else f(x)=f^1(x)

y=x²-81
-> x=y²-81 (exchahge x and y)
->y²=x+81 (solve for y)
[tex]y= \sqrt{x+81} \ or \ y=- \sqrt{x+81} [/tex] It is because (f^-1)(x) is not a function!

with x>=-81

Answer Link

Otras preguntas

The Senate’s 100 members cannot agree on a law that forces all fast-food restaurants to sell veggie burgers only. They are split right down the middle: 50 are i

Which of the following is a list of the positive factors of 60?

What role did american inventors and industrial ingenuity play in the growth of american industry? apush?

Faircross farms harvests its crops four times annually and receives payment for its crop 90 days after it is picked and shipped. however, planting, irrigating,

Stress is considered one of the potential causes of gingivitis. a. True b. False

select the correct verb conjunction for the following subject: los amigos (3 points) A) sieve B) sirvo C) servimos D) sirven

Which one of the following parenting factors is associated with improved IQ scores in children? A. Strict discipline B. A stable home and varied activities C. E

Mrs. Wise bought 3 lb of apples at $4 per lb. The following day there was 20% discount so she bought another 5 lb. What was the average price for all apples she

Lisa caught a 3 1/4( mixed number) pound fish. How much did it weigh in ounces?

peter the Great reduced the power of the boyars by