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I have posted a link to this topic so the OP can see my work.Maths problem please help me?

1.) A liquid flows from container A to B. The volumes, in cm^3 of the liquid in the containers A and B, t seconds after the start of the experiment are

A(t)=-t^3+at^2+p

B(t)=bt(t-2)^2+2t^2+ct+q

At the start of the experiment container A has 300cm^3 and B is empty. Find the values of p and q.

Explain why 300-A(t)=B(t) is in identity for all non-negative values of t up to the instant when container A is empty.( I don't know what the question means)

Use the identity above to find value of a, b and c

2. Factorize (2n+1)^3-(2n-1)^3 completely and show that the difference between the cubes of two consecutive positive odd numbers can never be divisible by 4.