SOLUTION: Hello, I need help with these two exercises. 1. Evaluate g(4) when g(x) = 3^(x + 1) -3. 2. Evaluate Find j(0) when j(x) = -2 (3/2)^x. Thank you so much, Fernando

Question 1196246: Hello,
I need help with these two exercises.
1. Evaluate g(4) when g(x) = 3^(x + 1) -3.

2. Evaluate Find j(0) when j(x) = -2 (3/2)^x.
Thank you so much,
Fernando
Answer by ikleyn(52832) (Show Source): You can put this solution on YOUR website!
.


In this problem, the word "evaluate" means 

    +-----------------------------------------------------------------------+
    |    substitute given value of x into the given formula instead of x    |
    |    and then calculate the obtained numerical expression               |
    +-----------------------------------------------------------------------+


Assignments of this class are traditionally considered as simplest problems of Algebra.


So, in case (1), we do this: we substitute value of 4 instead of x into the formula;

                             we get  g(4) = ;

                             and we calculate it   =   = 

                                                  = 3*3*3*3*3 - 3 = 9*9*3 - 3 = 81*3 - 3 = 243 - 3 = 240.    


                             ANSWER:  g(4) = 240.




    In case (2), we do this: we substitute value of 0 instead of x;

                             we get  j(0) = ;

                             we know that any real number in degree 0 equals 1, so  = 1;

                             and we calculate it   = -2.


                             ANSWER:  j(0) = -2.

Solved.

Use this mantra every time as you solve similar problems.

RELATED QUESTIONS
Evaluate the function when x=3, x=0, x=-2 1)g(x)=4x-1... (answered by solver91311)

Evaluate: (f/g)(-1) - g(3) for f(x) = x^2 +1 g(x) = x - 4 (answered by stanbon)

f(x)=2x-3 and g(x)=x^2+2x+4 evaluate... (answered by ewatrrr)

Evaluate the function when x=4, x=0, and x=-3. 1.) f(x) = 1.5x - 0.4 2.) h(x) = 3/8x... (answered by checkley77,BrittanyM)

evaluate (f•g)(x) if f(x)=2x² and g(x)=3x-2 when... (answered by MathLover1)

X | f(x) | g(x) | df/dx | dg/dx _____________________________ -2 | 3 | 1 (answered by robertb)

Evaluate : -4x^2+3y^3 When x=4 y=-1 (answered by Fombitz)

EVALUATE THE FUNCTION WHEN X=2,X=0,X=-2.... (answered by Nate,checkley71)

I need help really bad..What is a Remainder Theorem? Ihave been working on these... (answered by nycsub_teacher)