The sum of first 3 terms is 6 and that of last 3 is 16. if ap has 13 terms, what is sum of 3 middle terms.
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1
Answer:
11
Step-by-step explanation:
SUM OF MIDDLE THREE TERMS
= 1/2 [ SUM OF THREE FIRST+ SUM OF LAST
THREE TERMS]
=>. SUM OF MIDDLE THREE TERMS=
1/2( 6+16)= 22/2= 11
ANSWER= 11
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