Solving nonalgebraic equations

Question

How can I solve an equation such as

(1/5)^x - 4x = 0

using Matlab?

score 2 · Answer 1 · answered Apr 01 '12 at 11:10

2

That's not an equation, it's just an expression. Did you mean this?

(1/5)^x - 4x = 0

answered Apr 01 '12 at 11:10

Albert Wifstrand

I edited the question ca. 20 minutes ago to correct this but it still needs to be reviewed... – Franck Dernoncourt Apr 01 '12 at 11:50

score 1 · Answer 2 · answered Apr 01 '12 at 11:19

1

Try the solve function.

syms x
solve((1/5)^x - 4x)

answered Apr 01 '12 at 11:19

Squazic

score 1 · Answer 3 · answered Apr 01 '12 at 11:29

1

Alternatively you can use MATLAB's gatool if your equation is complex.

function [F]=fitness_A(x)
F = abs((1/5).^x - 4.*x);
end

enter image description here

answered Apr 01 '12 at 11:29

3 Answers3