find the 31st term of AP whose 11th term is 38 and 16 term is 73
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find the 31st term of AP whose 11th term is 38 and 16 term is 73
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Answer:
178
Step-by-step explanation:
a11=38
a+10d=38______(1)
a16=73
a+15d=73______(2)
from equation 1 and 2
d=7
from equation 1
a=(-32)
now we have to find out a31
so, a+30d
=(-32)+30*7
=(-32)+210
=178