For the second question I have ried the following... please correct me if I'm wrong or some help as to how to proceed further. Thank You
PS- I am sorry for the small images..
a) Every odd number greater than 3 can be written as the sum of two prime numbers.
b) If n is not a multiple of 3, then n² + 2 is a multiple of 3.
c) If n is an odd number, then n² + 4 is prime.
d) If X ⊆ A and Y ⊆ B , then X ∪ Y ⊆ A ∩ B.
In Thomson's experimental determination of the ratio m/e of the mass to the charge of an electron, in which the electrons were subjected to an electric field of intensity E and a magnetic field of intensity H, the equations
m[d2x/dt2) + He(dy/dt) , m[d2y/dt2) - He(dx/dt) = 0 ,
were...