The expansion of \((ax-2)^4\left(1+\dfrac bx\right)^3\) is written in descending powers of \(x\).
The first 3 terms of this expansion are \(81x^4+999x^3+cx^2\).
It is given that \(a\), \(b\) and \(c\) are positive integers.
Find the values of \(a\), \(b\) and \(c\).[10]
Sign in to view the step-by-step solution
Need help? Join our JC Math tuition classes.
Learn more