question no 47.
given - a=213, d=A2-a1 =205-213=-8
an=37
a+(n-1)d=37
=>(n-1)(-8) = 37-213
=>(n-1)(-8) = -176
n-1 = -176/-8
n = 22+1 =23
therefore - middle term
= (n+1/2)th
=(23+1/2)th = (24/2)th = 12th
a+11d= 213+11x(-8)
=213-88=125 ans.
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question no 47.
given - a=213, d=A2-a1 =205-213=-8
an=37
a+(n-1)d=37
=>(n-1)(-8) = 37-213
=>(n-1)(-8) = -176
n-1 = -176/-8
n = 22+1 =23
therefore - middle term
= (n+1/2)th
=(23+1/2)th = (24/2)th = 12th
a+11d= 213+11x(-8)
=213-88=125 ans.