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20.09.2020 •
Mathematics
If the common differences of an Ap is 5, the value of a18-a13 is
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Ответ:
25
Step-by-step explanation:
The n th term of an AP is
where a₁ is the first term and d the common difference
Here d = 5, then
a₁₈ = a₁ + 17d = a₁ + 85
a₁₃ = a₁ + 12d = a₁ + 60
Thus
a₁₈ - a₁₃
= a₁ + 85 - a₁ - 60
= 25
Ответ: