Problem
ALG-B1-M05-P001 Find a Term of a Progression
#1
★☆☆☆☆ Level 1 of 5
In an arithmetic progression \(a_1=4\), \(d=5\). Find \(a_{15}\).
Use \(a_n=a_1+(n-1)d\).
\(a_{15}=4+14\cdot5=74\).
Basic technique.