Find 31st term of AP whose 11 term is 38 and 16 term is 73.
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Step-by-step explanation:
a11 = a+10d = 38-------(1)
a16= a+15d =73--------(2)
By elimination method,
-5d = -35
d = 7
From 1
a = 38 - 10d
a = 38 - 70 = - 32
a31 = a + 30d
= - 32 + 210 = 178
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