y = I x + 5 I -1
f(-x) : I x + 5 I - 1
I- x + 5 I - 1
- f(x) = - I x + 5 I + 1
- ( I x + 5 I ) - ( -1 )
- I x + 5 I + 1
f(-x) ≠ f(x) therefore I x + 5 I -1 is not an even function .
f(-x) ≠ - f(x) therefore I x + 5 I - 1 is not an odd function.
Neither even nor odd
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hope this helps!