%03-amaliy Tog'ayeva Zarina 17-raqam



A = [2 5 9 16;
    11 16 3 1;
    25 14 -38 7;
    -8 9 -16 -42];

B = [1; 1; -3; 6];

% 1-usul: Chap bo'lish operatori
x1 = A\B;
disp('1-usul: A\B');
disp(x1);

% 2-usul: mldivide funksiyasi
x2 = mldivide(A,B);
disp('2-usul: mldivide');
disp(x2);

% 3-usul: Kramer formulasi
D = det(A);
x3 = zeros(4,1);

for i = 1:4
    C = A;
    C(:,i) = B;
    x3(i,1) = det(C)/D;
end

disp('3-usul: Kramer');
disp(x3);




% 3.5- topshiriq 17-misol


clc;
clear;
close all;

% Funksiya grafigi
x = 1:0.001:2;
y = x.^2 + log(x) - 4;

plot(x,y);
grid on;

% Ildizni topish
a = 1;
b = 2;

for i = 1:20
    c = (a+b)/2;

    if (a^2 + log(a) - 4)*(c^2 + log(c) - 4) < 0
        b = c;
    else
        a = c;
    end
end

X = (a+b)/2;
disp('Tenglamaning ildizi:');
disp(X);