y 2exp3x4 write a program to slove for fisr positive root de

Solution

syntax error                                                                                                                                                      

>>>     y1 =  -2exp(3-x)+4; -- there is no * between 2 and exp.

code :

function root = search(x)
y1 = -2*exp(3-x)+4;
precision = 1;
m = x + precision;
y2 = -2*exp(3-m)+4;

while(y1*y2 > 0)
y1 = -2*exp(3-m)+4;
m = m + precision;
y2 = -2*exp(3-m)+4;
end
root = y2;
end

disp(search(0));

Output: 2

The first positive root is 2 for the above equation. Just looping the roots till it gets a positive value.