Question

write a java program
3 6 11 18.......n terms​

Answer 1

Explanation:

Input: N = 5

Output: 45

Explanation:

For N = 5,

Nth term = ( N * ( (N/2) + ( (N%2) * 2) + N )  

        = ( 5 * ( (5/2) + ( (5%2) * 2) + 5 )  

        = ( 5 * ( 2 + ( 1 * 2) + 5 )

        = 45

Input : 6  

Output : 54

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Answer 2

Answer:

Input: N = 2

Output: 9

The sum of first 2 terms of Series is

3 + 6 = 9

Input: N = 3

Output: 20

The sum of first 3 terms of Series is

3 + 6 + 11 = 20

Explanation:

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