Question

Find the middle term of the A. P. 95 , 86 , 77 , - - - - - - - - - , - 247

Answer 1

Answer:

n = 39

Step-by-step explanation:

a = 95 , d = 86 – 95 = –9 , tn = –247 tn = a +(n – 1)d , –247 = 95 + (n –1 ) –9 –247 = 95 –9n +9 , –247 = 104 – 9n , –351 = –9n , 9n = 351 , n = 39