Thursday

January 29, 2015

January 29, 2015

Posted by **Elli** on Thursday, December 22, 2011 at 7:21pm.

Thank you!

---------------------------------------

1.where does the reciprocal function of f(x)=3-x increase?

a){XER|x>3}

b){XER|x<3}

c){XER|x≠3}

d){XER}

Answer: C

----------------------------------------

2. What is the domain of the reciprocal function of f(x)=5x+1?

a) {XER|x≥-1/5}

b) {XER|x≤-1/5}

c) {XER|x≠-1/5

d) {XER}

Answer: C

--------------------------------------

3. State the range of f(x)= 1/3x+4

a) [YER|y>-4/3]

b) [YER|y≠-4/3]

c) [YER|y>0]

d) [YER|y≠0]

Answer B

---------------------------------------

- Precalculus -
**Reiny**, Thursday, December 22, 2011 at 7:58pm1. correct

2. correct

3. did you mean fx) = 1/(3x+4) ?

if so, then the range is d)

- Precalculus -
**Luckylin**, Thursday, December 22, 2011 at 8:04pmFor 3, its the reciprocal of 3x+4

There is no brackets.

3x+4=0

3x=-4

x≠-4/3

So b?

- Precalculus -
**Elli**, Thursday, December 22, 2011 at 8:22pm@ Luckylin and Reiny, yes, no brackets

- Precalculus -
**Reiny**, Thursday, December 22, 2011 at 8:38pmIf there are no brackets, then the equation is simply the straight line

y = (1/3)x + 4

the range of that line is y ∊R, which is none of the choices, so you must be mistaken

I bet you have a numerator of 1 and a denominator of 3x+4

which has to be written as 1/(3x+4) and I stand by my answer of d)

**Answer this Question**

**Related Questions**

Math - Determine the range of each function a)f(x)=(x^2+3)^2,XER Answer is f(x)...

Math - Verify these answers :] Would be thankies~ 1. Determine the intervals in ...

math - a function f(x)has doamin {xeR/x>-4} and range {yeR/y<-1) . ...

Math !!!!! - a function f(x)has doamin {xeR/x>-4} and range {yeR/y<-1) . ...

Grade 11 Math functions - y=x^2-5x+6 Domain= {xeR or 2<x<3 } Range={ } ...

math - g(x)=3 sin x domain and range is the domain: {xER} range {yEr|3< or = ...

math - g(x)=3 sin x domain and range is the domain: {xER} range {yEr|3< or = ...

maths - the functions f and gare defined by f(x)=2/(x+1), x>0 g(x)=1-x^2, xER...

Math - f(x) is a linear function which is increasing for XER. a) Will the ...

mega urgently important maths - the functions f and g are defined by f(x)=2/(x+1...