>> a=sqrt(exp(exp(1))); b=tan(pi^2/3);
>> 2*a^2+3*a*b^3-5*a^3*b^5
>> a=sqrt(exp(exp(1))); b=tan(pi^2/3);
>> sec(atan(a))
3．在计算机上练习以下语句的输入：(（1）为求解格式)
>> (3*a*x^2+4*b*x^(1/2))/(x-1)
ans =(3*a*x^2+4*b*x^(1/2))/(x-1)
>> (sin(2*x+pi/4)-log(3*x))/sqrt(x^2+1)
ans = (sin(2*x+1/4*pi)-log(3*x))/(x^2+1)^(1/2)
>> (cos(x)^2-sin(2*x))*exp(2*x)
ans =(cos(x)^2-sin(2*x))*exp(2*x)
习题二（只写出输入格式）
1
>> x=linspace(0,3,100);
>> y=x.^(1/3);
>> plot(x,y)
>> x=linspace(-2,2,50);
>> y= (1/4).^x;
>> plot(x,y)
>> fplot('log(x)/log(1/4)',[0.1,3])
