Question

Evaluate the following expression when x = -4 and y = 4.

x^6-x/4y

A. 1,023/4

B. 1,025/4

C. 16,385/4

D. -1,023/4

Answer 1

Answer: The correct answer is option C. 16,385/4.

Explanation: First of all, we evaluate the expression x^6. Putting x= -4 gives (-4^6) which is equal to 4096. The next part (-x/4y) on substituting x = -4 and y =4 gives us the positive expression (1/4).

Adding both these parts, we get (4*4096+1)/4. This is finally evaluated as (16,384+1)/4, which is equal to the required answer of 16,385/4.