01
Have a go first
The Question
The nth term of a sequence is n² + 3n. Find the first term in the sequence that is greater than 100.
02
Then check together
The Answer
Reveal the Answer
108 (the 9th term)
Test values: n = 8 gives 88, n = 9 gives 108. Show the trial-and-improve reasoning rather than solving the inequality formally — it is faster and it is what the mark scheme accepts.
Now watch the solution
Pencil and paper
Practice Sheet — free this week
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