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The number of terms of an A.P. is even; ...

The number of terms of an A.P. is even; the sum of the odd terms is 310; the sum of the even terms is 340; the last term exceeds the first by 57. Find the number of terms and the first terms of series.

A

Number of terms of the series `= 20`

B

Number of terms of the series `= 10`

C

The first term of series = 4

D

The first tem of series = 5

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A
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