Question

The sum of 25 terms in the following sequence 2,5/2,3...... is​

Answer 1

Given:

a ( first term ) = 2

d ( common difference ) = 1/2

n ( number of terms ) = 25

To Find:

The sum of 25 terms in the following sequence.

Solution:

an ( Last Term ) = a + ( n - 1 )d

an = 2 + 12

an = 14

S = n/2 ( a + an )

S = 25/2 ( 2 + 14 )

S = 25 × 8

S = 200

Answer:

The sum of 25 terms is 200.

Answer 2

Answer:

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