[tex]i \: need \: ya \: help[/tex]
Find the sum of the two middle most terms of the given AP:
-4/3, -1, -2/3,......,13/3
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[tex]i \: need \: ya \: help[/tex]
Find the sum of the two middle most terms of the given AP:
-4/3, -1, -2/3,......,13/3
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Common difference, d = - 1 + 4/3 = ( - 3 +4 ) / 3 = 1 /3
An = a+( n - 1 ) d
13/3 = - 4 /3 + ( n - 1 ) ( 1/3 )
13/3 + 4/3 = ( n - 1 ) 1/3
17 / 3 = ( n - 1 ) 1 /3
17 = ( n - 1 )
n = 17 +1 = 18
Middle most terms = n /2 and ( n /2) + 1
=> 18/2 and ( 18 /2) +1