Seudónimo Seudónimo
  • 02-08-2017
  • Mathematics
contestada

Find the x and y intercepts

Find the x and y intercepts class=

Respuesta :

choixongdong
choixongdong choixongdong
  • 02-08-2017
f(x) x^2  -  9
g(x) = 1/3 f(x)

y intercept:

f(x) = x^2 - 9
x = 0, y = - 9

g(x) = 1/ 3 f(x)  = 1/3(x^2 - 9) = 1/3x^2 - 3
x = 0, y = -3

so y intercept : 
f(x): -9
g(x) = -3

x intercept when y = 0
x^2 - 9 = 0
x^2 = 9
x =+3 and x = -3

g(x) = 1/3x^2 - 3 = 0
1/3x^2 = 3
x^2 = 3(3)
x^2 = 9
x = -3 and x = + 3
so g(x) also has x intercepts: -3 and 3

answer is A. first one.

f(x) x intercepts: -3 and 3
f(x): y intercept : -9
g(x) x intercepts: -3 and 3
g(x) y intercept :  -3
Answer Link

Otras preguntas

a piece of wood is 180cm long, Tom cuts it into three pieces in the ratio 2:3:4 Work out the length of the longest piece
The sum of a number and 18 times its reciprocal is 11. Find the number(s). Let x represent the unknown number. The Reciprocal of x is____?
Put brackets in the expression below so that it's value is 45.024. 1.6 + 3.8 * 2.4 *4.2 (*= times )
copy this figure onto grid paper. draw line to divide the figure into 4 congruent polygons. how do you know the ploygons are congruent
If you multiply a number by five and then subtract negative ten, the difference is negative thirty. What is the number?
would you rather be a senator or a representative member? why or why not?
Factor completely, the expression: 2x^3-2x^2-12x
20% of my money is £2.55 What is 2/5 of it?
Explain how engineers and scientists may work together to produce a protein in the lab.
how are the themes and topics different