Math, asked by livelyy12, 4 months ago

sum of 5th term to 15th term of an AP whose nth term is 7+8n​

Answers

Answered by dharavathbunny4
0

Answer:

=5th+15th+nth

=20th+nth

=20nth

n=20th

=7+8n

=15n

n=15

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