123
02
PRACTICE MISSIONarithmetic and geometric sequences and series
arithmetic and geometric sequences and series
GUIDED CASE: An arithmetic sequence has a_1=7, d=4, and n=10. First find a_10=43. What is S_10?
MODELPattern Forecast
ADV MATH
PROVEChoose with evidence
CLUE
Use the scaffold, but make each step earn its place.