Question

the 1st,3rd,4th terms are 12,21,8 respectively.find the 2nd term
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Answer 1

Answer:

-1

Step-by-step:

first and fourth terms are called extreme terms and second and third terms are called middle terms.

∴sum of extremes are equall to the sum of middles

lets take second term as x

12+8 = 21+x

x shall be -1

hope this was helpful

Answer 2

Answer:

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