Question

Halla el dominio y el rango de cada funcion

A. f(x) = 5x - 7
B. f(x) = |x|
C. f(x) = 1-x
D. f(x) = -2x³ + 8x + 3
E. f(x) = 12--x-5
F. f(x) = √x+1

Answer 1

dominio, despejar y rango(desp x)

a)f(x)=5x-7

Df:R

y=5x-7

5x=y+7

x=(y+7)/5

Rf:R

b)f(x)=1/x

Df:R-{0}

Rf:R-{0}

c)f(x)=2x^3+8x+3

Df:R

Rf:R

d)f(x)=12/(x-5)

Df:R-{5}

Rf:R-{0}

e)f(x)=raiz(x+1)

Df:x+1>=0

x>=-1

[-1,+infinito)

y=raiz(x+1) ()^2

y^2=x+1

x=y^2-1

Rf:R