find the middle term of the a.p 5,8,11,....71
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Answer:
a= 5, l= 71, d= 8-5=3
Step-by-step explanation:
l= a+(an-1) d
71= 5+(an-1)3
66= 3an-3
69=3an
23=an
So, last term is 23rd term.
Middle term will either be 11 or 12th term
a11= 5+(11-1)3
a11= 5+30
a11= 35
a12=5+(12-1)3
a12=5+33
a12=38
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