Math, asked by keertana2004, 1 year ago

please answer the 28th question its emergency I have exam today please.....

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Answered by dyaneshdamodaran
1

Answer:

Let a , d are first term and common


difference of an A.P


********************************************

nth term = Last term = a + ( n - 1 )d


an = a + ( n - 1 )d


********************************************


Now ,


It is given that ,


Third term = 12


a + 2d = 12 ------( 1 )


Last term = 106


a + 49d = 106 ---( 2 )


Subtract ( 1 ) from ( 2 ) , we get


47d = 94


d = 2


Substitute d value in equation ( 1 ) ,


We get


a + 2 × 2 = 12


a = 12 - 4


a = 8


29th term = a + 28d


a29 = 8 + 28 × 2


= 8 + 56


= 64


Read more on Brainly.in - https://brainly.in/question/127960#readmore


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dyaneshdamodaran: Sorry wrongly answered
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