1. To symbolically compute , the best MATLAB command is

A. diff(cos(x3), 2)

B. diff(cos(x3), x, 2)

C. diff(cos(x3), sym(x), 2)

D. syms x; diff(cos(x3), 2)

2. To numerically calculate , the MATLAB command you may use is

A. x=0:0.1:10; trapz(x, sin(x^4))

B. quad(sin(x^4),0,10)

C. quad(sin(x.^4),0,10)

D. quad(sym('sin(x^4)'), 'x', 0, 10)

3. To compute , the best MATLAB command is

A. integral(@(x) x.^4.*exp(-2*x),1,3)

B. integral(@(x) x.^4.*exp(-2*x),1,3)

C. integral(@(x) x.^4*exp(-2*x),1,3)

D. int(@(x) x.^4.*exp(-2*x),1,3)

4. To symbolically calculate , the best MATLAB command is

A. int(sym('sin(x.^2)'), 'x', 'a', 'b')

B. int(sym(sin(x^2)), 'x', a, b)

C. int(sym('sin(x^2)'), 'x', 'a', 'b')

D. int(sym('sin(x^2)'), 'x', a, b)