#Negative plus a positive equals plus

#Negative plus a positive equals plus

is 0 until you get to 1 + 1 then the sum is equal to 0 plus a carry 1. So in summary, because the we only allow the log’s base to be a positive number not equal to 1, that means the argument of the logarithm can only be a positive number. So to represent a positive binary number (+n) and a negative (-n) binary. Then what we know is that, if the base of our power function is positive, it doesn’t matter what exponent we put on that base (it could be a positive number, a negative number, or 0), that power function is going to come out as a positive number. And if those numbers can’t reliably be the base of a power function, then they also can’t reliably be the base of a logarithm.įor that reason, we only allow positive numbers other than 1 as the base of the logarithm. Youll need to keep track of whether youre dividing by a positive or. So 0, 1, and every negative number presents a potential problem as the base of a power function. Whenever we multiply or divide by a negative number, we have to flip the inequality sign. And as you know, unless we’re getting into imaginary numbers, we can’t deal with a negative number underneath a square root. If you raise a negative number to a positive number that’s not an integer, but instead a fraction or a decimal, you might end up with a negative number underneath a square root. a + (-b) (a - b) For example: 4 + (-5) -1 (-5) + 7 2 Thus, negative plus positive is negative or positive depending on the magnitude of numbers. In the same way, 1 raised to anything is always still 1. Addition of a positive number and a negative number: While adding a positive and a negative number, we take the difference of the absolute values of both the numbers and attach the sign of the greater number with the answer. Or, put a different way, 0 raised to anything is always still 0. In other words, there’s no exponent you can put on 0 that won’t give you back a value of 0. When you have a power function with base 0, the result of that power function is always going to be 0. To understand why, we have to understand that logarithms are actually like exponents: the base of a logarithm is also the base of a power function. The reason has more to do with the base of the logarithm than with the argument of the logarithm. Any positive odd number is of the form 2n2B1. Negative numbers, and the number 0, aren’t acceptable arguments to plug into a logarithm, but why? Question 349711: A positive odd number plus a positive odd number equals a. In other words, the only numbers you can plug into a log function are positive numbers. The argument of a log function can only take positive arguments.

While the value of a logarithm itself can be positive or negative, the base of the log function and the argument of the log function are a different story.