write all the formulae related to progressions
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Formula Lists
General Form of AP a, a + d, a + 2d, a + 3d, . . .
The nth term of AP an = a + (n – 1) × d
Sum of n terms in AP S = n/2[2a + (n − 1) × d]
Sum of all terms in a finite AP with the last term as 'l' n/2(a + l)
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