Question

which term of an Ap is 3,10,17,...will be 85 mote than its 13 term

Answer 1

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Answer:-

Given data:-

A.P: 3,10,17,...

We know that, Tn = a + (n-1) d

Here, a = 3 , d = 7


Step-by-step explanation:
T(13) = 3 + (13-1)7
T(13) = 3 + (12).7
T(13) = 87

Then from the question we have to find
n = ?
for Tn = T(13) + 85

Tn = 87 + 85
Tn = 172

then , by using same formula,
=> 172 = 3 + (n - 1)7
=> 169 = 7n - 7
=> 176 = 7n
=> n = 25.14
n= 26

Hence,26th term of the given A.P is 85 more than 13th term of A.P.









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Answer 2

Answer:

Step-by-step explanation: