Can you please do only 2 and 4

Thank you

Q2: Show that: x3 is 0 (x4) (3pt) x is not 0 (x3) (3p a) b) t) 03: Show that if f(x) = an&n + an-11"1 + numbers and an 0, then f(x) is 0(x") + a1x1 + a, where ao,ai, a2,.., an are real Q4: Analyze running time of binary search (the algorithm is given in class notes). You must explain your answers: (7pt)