Seudónimo Seudónimo

01-03-2016
Mathematics

contestada

If f(x) = x^3-2x^2 which expression is equivalent to f(i)

Respuesta :

apologiabiology apologiabiology

01-03-2016

remember that
i^2=-1 so

f(i)=i^3-2i^2
i^3=i^2 times i=-1 times i=-i

2i^2=2(i^2)=2(-1)=-2

f(i)=-i-(-2)
f(i)=-i+2

answer is -i+2 or 2-i

Answer Link

Otras preguntas

what is the answer for this MATH PROBLEM???please explain how you got the answer, thank you

"a monopolist earns $50 million annually and will maintain that level of profit indefinitely, provided no other firm enters the market. if another firm successf

In 2011, approximately what percentage of all probationers in the united states were white (non-hispanic)?

Assume that women's heights are normally distributed with a mean given by mu equals 63.2 in, and a standard deviation given by sigma equals 2.1 in. complete p

Identify the developments and how they impact individuals or larger groups/cultures.

The number of years of healthy life expected, on average, in a given population is the disability-adjusted life years (dalys). a. True b. False

PLEASE HELP 13 PTS!!!!! WILL MARK BRAINLIEST!!! describe what happens during meiosis 1 and meiosis 2.

Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ = 141 seconds and a standard devi

(1/x-2)-(1/x+2)=(A)=0(B)=-(1/4)(C)=(-4/x^(2))(D)=(4/x^(2)-4)(E)=(2x/x^(2)-4) show work

I REALLY need help!!!!!