If the common difference of an A. P. is 5, then value of a₁₈ -a₁₃ is ___.
10
25
5
20
Answers
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1
Answer:
a₁₈ - a₁₃ = 25
Step-by-step explanation
- Find the value of 18 th term a₁₈ = a+(n−1)d
= a + 17d
= a + 17(5)
= a + 85
- Find the value of 13th term a₁₃ = a + (n - 1)d
= a + 12d
= a + 12(5)
= a + 60
→Now, a₁₈ - a₁₃ :
⇒a + 85 -(a + 60)
⇒a + 85 - a - 60
⇒85 - 60
⇒25
∴a₁₈ - a₁₃ = 25
Hope you understood!
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