Question

R = (a, b) : a + 5b = 42 and a, b ∈ N has m elements and $\sum\limits_{n=1}^{m}(1+i^{n!})$ = x + iy (where i = √-1). Find x + y + m.

• A. 20
• B. 12
• C. 8
• D. 13

Answer 1

Answer: (A)

20

Answer 2

The Correct answer is option is (A) : 20