Question

All the formulas of AP(arithmetic progression).​

Answer 1

an =a+(n-1)d

d=a2-a1

These two are the main equation of Ap

Answer 2

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añ = a + (n-1)d

Sñ = n/2 [ 2a + ( n-1)d ]

Sñ = n/2 [ a + l ]

d = a2 - a1

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