Find the middle term of the ap 213 205
Asked by admin @ in Math viewed by 312 People
Find the middle term of the AP 213, 205, 197... 37.
Asked by admin @ in Math viewed by 312 People
Find the middle term of the AP 213, 205, 197... 37.
Answered by admin @
Hello Mate
In this Question a= 213
d= a2-a1 = 205 - 213 = -8
now,
37= a+(n-1)d
37= 213 + (n-1)-8
37= 213 -8n +8
37= 221 -8n
8n=221 - 37
8n= 184
n=184/8
n=23
the middle most term would be 23/2 = 11.5 which is 12
an= a +(n-1)d
an= 213 +(12-1)-8
an= 213 -88
an=125
the middlemost term is 128
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