The reciprocal of a negative number is also a negative number because when the two numbers are multiplied the answer is 1. For example, the reciprocal of -6 is -1/6, and the product of these two numbers is -6 x (-1/6)= 1.
The reciprocal of a number is also known as a multiplicative inverse, and it is defined as that number which when multiplied by the given number gives the result as unity, in other words 1. A reciprocal is determined by exchanging the position of the numerator and denominator in a given number. For example, the reciprocal of -2/3 is -3/2.
Learn MoreThe multiplicative inverse of a negative number must also be a negative number. By definition, the product of a number and its multiplicative inverse is (positive) 1, which cannot be achieved by multiplying a positive and a negative number together.
Full Answer >A negative minus a negative is equal to another negative number, a positive number or zero, depending upon the numbers in the equation. Subtracting a negative number from another negative number is the same thing as adding a positive number.
Full Answer >A non-real, or imaginary, number is any number that, when multiplied by itself, produces a negative number. Mathematicians use the letter "i" to symbolize the square root of -1. An imaginary number is any real number multiplied by i. For example, 5i is imaginary; the square of 5i is -25.
Full Answer >The two numbers that have a tens digit that is eight more than the ones digit are 80 and 91. Note that there are some larger numbers that also exhibit this pattern, such as 180, 280, 191 or 291.
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