If the common difference of an ap is 3, then find a20-a15
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Answered by
31
Hi there
Your answer is :- 15
d = 3 (given)
We know that,
an=a+(n-1)d
So,a20=a+(20-1)(3)
a20=a+19(3)
a20=a+57
Similarly, a15=a+14d
a15=a+14(3)
a15=a+42
Now,a20-a15=(a+57)-(a+42)
=a+57-a-42
=57-42
=15
Thank You
Your answer is :- 15
d = 3 (given)
We know that,
an=a+(n-1)d
So,a20=a+(20-1)(3)
a20=a+19(3)
a20=a+57
Similarly, a15=a+14d
a15=a+14(3)
a15=a+42
Now,a20-a15=(a+57)-(a+42)
=a+57-a-42
=57-42
=15
Thank You
riyakumariaecs1:
Thanks for your answer friend
Answered by
12
Hence, a20-a15=15....
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