find the value of the middle most term(s)of the A.P -11,-7,-3____49
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a= - 11
d = 4
L = 49
=> a + (n-1) d = 49
=> - 11 + (n-1) 4 = 49
=> (n-1) *4 = 60
=> n - 1 = 15
=> n =16
Total no. Of terms = 16
T8 = a+7d= - 11 +28= 17
T9 = a+8d = - 11 + 32 = 21
d = 4
L = 49
=> a + (n-1) d = 49
=> - 11 + (n-1) 4 = 49
=> (n-1) *4 = 60
=> n - 1 = 15
=> n =16
Total no. Of terms = 16
T8 = a+7d= - 11 +28= 17
T9 = a+8d = - 11 + 32 = 21
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