Concept 5.6 · Check understanding
From Sums Back to Terms
Step 1 of 2
- Step 1
- Step 2
- Probe
With Sₙ = n² + 2n, tap the expression that gives the third term.
, → a₃ = or
Tap the part you would look at.
Concept 5.6 · Check understanding
Step 1 of 2
, → a₃ = or
Tap the part you would look at.