a level maths, rates of change, differentiation, year 2Watch this thread
What have you tried so far?
What techniques do you know for solving 1st order DEs?
I know all of them. Chain rule, quotient rule, product rule. I know I have to integrate for part b though. But I don’t know how to separate the fraction . I did a^(3/2) * t^(-2) . But can I simply divide both sides by a^(3/2). Is there an invisible 1 on the left so I get 1/a^(-3/2) ?
Int A^(-3/2) dA = Int t^(-2) dt