If x and y are natural numbers such that x + y = 2017, then what is the value of (– 1)x + (– 1)y?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 0
x + y = 2017
from this, we infer that one no. is even and the other no. is odd
So,
= (-1)x + (-1)y [considering x = even, y = odd]
= 1 - 1 = 0