Inserting n arithmetic means between two numbers (Common difference between inserted AMs is (b−a)/(n+1); sequence is AP)

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Common difference between inserted AMs is (b−a)/(n+1); sequence is AP from a to b with n interior terms

What each symbol means

SymbolWhat it stands for
nNumber of means inserted
a,bEndpoints

When to use this

Full AP has n+2 terms: a, means…, b.