If there are 60 terms of an 80 1 st term of which is 8 and the last term 185.Find the 31 th term.
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Answer:
98.
Step-by-step explanation
Information given:
The A.P ,in total ,consists of 60 terms
a1=8 and l=185=a60 (we already know that there are only 60 terms and the last term would be the 60th term)
a60=a+59d
185=8+59d
185-8=59d
177/59=d
3=d
a31=a+30d
=8+30*3
=8+90
=98
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