Question

Which of the following is correct? 1. Cube of a negative number is always positive. II. Cube of a negative number is always negative. III. Cube of a negative number may be positive or negative. IV. All of the above If the digit in one's place of a number is 2, then the last digit of its cube will be:

Answer 1

Answer:

Cubes always involve multiplying a number by itself three times, so if the number is negative the cube will always be negative (and if the cube is negative, its cube root has to be negative too).