Question

WRITE MATLAB CODE TO SOLVE THIS!! YOU NEED TO DETERMINE TWO POSITIVE ROOTS

Determine the two positive roots of f(x) = 7 sin(x)e^-x - 1 :

a)Graphically.

b)Using the Newton-Raphson method.

c)Using the secant method.

Initial guesses of x can be decided from the plot and use maximum iterations. Explain your results.

Answer 1

function y=f(x)
y=7*sin(x)*exp(-x)-1;
end

x=0:0.1:2;
for i=1:21
y=f(x(i));
end

plot(x,y)

2.

3.