17-10-2018
Mathematics

contestada

L=a+(n-1)d

solve for n

Respuesta :

altavistard altavistard

19-10-2018

Answer:

(L-a)/d + 1 = n

Step-by-step explanation:

Let's isolate (n-1), and after that isolate n:

1) subtract a from both sides: L - a = (n-1)d

2) Divide both sides by d: (L-a)/d = n-1

3) Add 1 to both sides, to isolate n: (L-a)/d + 1 = n

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