Question

two formulas of AP class 10th for last term

Answer 1

Hey friend..!! here's your answer
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Formulas of Chapter 5 Arithmetic Progession
(Class X)

$an = a + (n - 1)d \\ \\ Sn = \frac{n}{2}(a + (n - 1)d) \\ \\ Sn = \frac{n}{2} (a + l)d$

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Answer 2

Answer:

General Form of APa, a + d, a + 2d, a + 3d, . . .The nth term of APan = a + (n – 1) × dSum of n terms in APS = n/2[2a + (n − 1) × d]Sum of all terms in a finite AP with the last term as 'l'n/2(a + l)