Question

3. The function f (x) = ln(x) is defıned over the real numbers (R1) for x E (0, oo) (though MATLAB will report ln(0) as -Inf). Use an if selection structure to check if the inputted value of x is in the domain of f(x) according to these three cases: Case 1: If the inputted is not in the domain of f(x) (i.e. if x E (-o,0), use the error command to print an error message to the Command Window. Case 2: If the inputted is on the domain (0, 1), to print a warning to the Command Window stating that the value of f(x)wil use the warning command be less than 0. Case 3: If the inputted x is in the domain |1, oo) then calculate and print to the Command Window the value of f(x). Hint: What are the branches in this selection structure? Identify them first, then begin to program the cases. NB: The symbol E is a mathematical symbol that can be interpreted in English as "is an element of." For example, if E [0, 5 then x is defined within (or "belongs to") that range of numbers. You will likely recall from calculus that parentheses indicate a specific interval does not include the end-point (a so- called "open interval"), while brackets indicate that the interval does include the end point (a so-called "closed interval") 4. Create a flowchart, and write pseudocode for, the prompt in Problem 3.

Answer 1

`Hey,

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clc
clear all
close all
x=input('Enter x: ');
if(x<=0)
error('x is less than 0 where function is undefined');
elseif(x<1)
warning('f(x) will be less than 0');
fprintf('ln(x)=%f\n',log(x));
else
fprintf('ln(x)=%f\n',log(x));
end

MATLAB R2018a Search Documentation Log In HOME PLOTS APPS EDITOR PUBLISH VEW Find Files Insert Run Section Go To Compare Comment% New Open Sav Breakpoints Rur Run and eAdvance Run and Indent Print Find Advance Time EIL NAVIGATE EDIT BREAKPOINTS BUN C:Users PRADEEP KALRA Documents MATLAB Editor- CAUsers PRADEEP KALRA Documents MATLAB\ saveee.m Current Folder x saveee.m bisectionmethodbypradeep.m SimpsonComp.m xfalsepos.m xfindroots.m xnewtonrapsonsbypradeep.m Name clo mathlab mynewdir clcar הll New folder a1.m a2.m x-input ('Enter x: '). ir (x0 error ('x is less than 0 where function is undefined' ) 7- elseif (x<1) warning (' f (x) will be less than 0') : a5.m A1.dat A1.mat fprintf'in (x) =%f\n', log (x) ) ; 10 - fprintf ('ln (x) =tf\n ', log (x) ) ; 11- 12- A3 dat 13 A4.dat AS.dat Details A Command Window Workspace New to MATLAB? See resources for Getting Started. Name Value Enter x: 0.5 0.5000 Warning: f (x) will be less than 0 In saveee (1ine 8) ln (x)-0. 693147 >> script In 13 Col 1 3:15 AM ENG O Type here to search 06/17/19

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