Final answer:
Upon evaluating f(-1) where f(x) is 1-x, and then multiplying by -1, the result is -2. However, this answer does not match any of the proposed options, suggesting an error in the question or the options provided.
Step-by-step explanation:
To find the value equivalent to (-1)f(-1), we first evaluate the function f(x) at x = -1:
f(x) = 1 - x
f(-1) = 1 - (-1) = 1 + 1 = 2
Then we use the value found to evaluate the expression:
(-1)f(-1) = (-1)(2) = -2
However, -2 is not one of the options provided in the question. The question or the options might contain a typo, as the options available do not match the correct calculation.
Hence, none of the given options, a) 0, b) 1, c) 2, d) -1, are equivalent to (-1)f(-1).