Find selected terms in a binomial expansion
For \((2x+1)^4\), state the leading coefficient, second coefficient, third coefficient, and power of \(x\) in the third term.
Worked practice: binomial expansion
Track each coefficient and the requested power in the expansion.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.