If the common difference of an A.P is 3, then a20 -a15 is
Answers
Answered by
2
Answer:
Step-by-step explanation:
a = 1st term
d = 3
then a20 = a + (20 - 1) d = a + 19x3= a + 57 ......... i
a 25 = a + 24 d = a + 24 x 3 = a + 72 ............................ ii
as per question i - ii
a20 - a25 = a + 57 - a - 72
= - 15
Answered by
1
Answer:
15
Step-by-step explanation:
a+19d-a-14d
=5d
=15
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