Problem Statement
In an arithmetic progression, a₁ = 7 and common difference d = 3. Find a₂₀.
Explanation
aₙ = a₁ + (n−1)d = 7 + 19×3 = 7 + 57 = 64.
Code Solution
SolutionRead Only
a20 = 7 + 19*3 = 64
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