Homework Help: math

Posted by Hasane on Thursday, March 14, 2013 at 9:43pm.

A student was asked to find the inverse of the function f(x)=3x-7.
The student began the solution with the following:

Write f(x) = 3x-7 as y = 3x-7
x= 3y-7

The student eventually got the right answer for f^(-1)(x) [inverse notation] but did not get full marks for the solution. Why not?

math - Steve, Friday, March 15, 2013 at 9:43am
he got x as a function of y, but did not illustrate that

f^-1(x) = (x+7)/3

Answer this Question

Related Questions

math - A student was given the function f(x) = x2 and asked to write the result ...
Algebra 2 - Find the inverse of the following function: f(x) = 3x + 12 I don&#...
Another Problem...PLz Help COunt Iblis - Statements Reasons 1. 3x - 7 = -4 2. 3x...
math - If the cards contain the following equations, what is the probability ...
Algebra 2 - 1.)Find inverse function of the function f(x)=(x+3)+9 2.)Find the ...
math! - about finding the inverse of y=(2x+1)/(x+3). should you multiply (x+3) ...
algebra/trig - 1. f(x)=x^3+5 does f(x) have an inverse? if so, find the inverse ...
Math - g(x) = 3x+5 / x-1 find the inverse function
CALC 2a - f(x)=x^3-3x^2-3x-8/(-3x^2-4x-6) Find the equation of the non-vertical...
math - Find the inverse of the function. f (x)=3 square root of 3x-3-4

For Further Reading

First Name:
School Subject:
Answer: