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11111nata11111 [884]
3 years ago
12

If the common differences of an Ap is 5, the value of a18-a13 is

Mathematics
1 answer:
Debora [2.8K]3 years ago
5 0

Answer:

25

Step-by-step explanation:

The n th term of an AP is

a_{n} = a₁ + (n- 1)d

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

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To find the profit of that day:


Given:

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