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Question
The 25th term of AP −5,−52,0,52............ is −b,
then what is the value of b?
then what is the value of b?
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Solution
First term of A.P=−5Common difference =−52−(−5)=52
We know that, an=a+(n−1)d
25th term=−5+(25−1)×52
=−5+(24)×52
=−5+60
=−55
Comparing with −b=−55⇒b=55
Common difference =−52−(−5)=52
We know that, an=a+(n−1)d
25th term=−5+(25−1)×52
25th term=−5+(25−1)×52
=−5+(24)×52
=−5+60
=−55
Comparing with −b=−55⇒b=55
Comparing with −b=−55⇒b=55
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