Question 1*State what the fundamental theorem of algebra guarantees for a non-constant complex polynomial.
Question 12***+If \(p(z)\) is a real cubic and \(1+i\) is a root, explain why at least one real root exists.
Question 13****Find the missing root of a monic cubic with roots \(2+i\), \(2-i\), and one more root, if the constant term is \(-10\).
Question 15****+Can a real polynomial of degree \(5\) have exactly two non-real roots counted with multiplicity? Explain.
Question 18*****A learner says the fundamental theorem of algebra gives a formula for the roots of every polynomial. Correct the statement.
Question 20*****Prove that a monic degree \(n\) polynomial with roots \(z_1,\ldots,z_n\) counted with multiplicity factors as \(\prod_{j=1}^n(z-z_j)\).
Question 31***+Let \(S(t)=\int_0^t v(s)\,ds\), where \(v(s)=3s^2+2\) is velocity in metres per second. Find \(S'(t)\) and interpret it.
Question 38*****A student claims \(\frac{d}{dx}\int_0^{x^2} e^t\,dt=e^{x^2}\). Explain the missing step and give the correct derivative.
Question 39*****Define \(Q(x)=\int_2^x f(t)\,dt\), where \(f\) is continuous and \(f(x)>0\) for all \(x\). Explain why \(Q\) is increasing.
Question 40*****Let \(R(x)=\int_x^{2x} f(t)\,dt\), where \(f\) is continuous. Derive a formula for \(R'(x)\).