Find the middle term of the AP with 17terms whose 5th term is 23 and d is -2
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middle term would be 9th term
d = -2
5th term= a+4d= 23
a+4*-2=23
a-8=23
a= 23+8
a=31
now 9th term is a+8d
31+8*-2=31-16= 15
thus middle term is 15
d = -2
5th term= a+4d= 23
a+4*-2=23
a-8=23
a= 23+8
a=31
now 9th term is a+8d
31+8*-2=31-16= 15
thus middle term is 15
ani6958:
how can u say middle term is 9
9th term*
see we find middle term of odd number by this formual (odd number +1/2)
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