Question

The sum of 2 + 7 + 12 + ........... + 47 is​

Answer 1

i think 103..................

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Answer 2

Step-by-step explanation:

The given AP is 2+7+12+.........+47

Let us re-write the given AP in reverse

order 47,42,........12,7,2.

Now,

the 5th term from the end of the given AP is equal to the 5th term from the beginning of the Ap 47,42......12,7,2

Here,

a = 47

d= 42-47

d = -5

Tn = a + ( n - 1 ) × d

= 47 + ( 5 - 1 ) × (-5)

= 47 + 4 × ( -5 )

= 47 - 20

= 27

Hence, the 5th term from the end of the given AP is 27 .

Hope.....it will help you