Question

if the common difference of an ap is 5 then what is a18-a13

Answer 1

a+17d-a-12d
5d
5×5=
25
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Answer 2

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Answer:

25

Step-by-step explanation:

a18 = a + 17 d

      = a + 17 (5)

      = a + 85

a13 = a + 12 d

      = a + 12(5)

      = a + 60

→a18 - a13 = (a + 85) - (a + 60)

                  = a +85 - a - 60

               = 25

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