如题所述
>> x=-6:0.01:-2;
>> y=x.*cos(x).*exp(sin(x));
>> plot(x,y);
>> grid on;
>> max(y)
ans =
5.6331
>> x(y==max(y))
-3.9100
>> min(y)
-8.2522
>> x(y==min(y))
-5.7000
所以最大点的(-3.9100,5.6331),最小点是(-5.700,-8.2522)