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Q.

If the common difference of an AP is 5, then a18-a13 is[[1]].


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Detailed Solution

If the common difference of an AP is 5, then a18-a13 is 25.
Given, in an A.P., the common difference is 5.
The 18th term is a+17d   and for 13th term is a+12d  .
a 18 − a 13 =a+17d−a−12d =5d  
According to question, d=5  
 So,
a 18 − a 13 =5 5 =25   Therefore, the correct answer is 25.
 
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