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Having given no base to your log and not specified natural or common, I assume you are asking if there is a base in which logyb5 = -1, ie is there is a number b such that b-1 = 5?
Yes.
If you want to know what that base is, then you can work it out:
Using:
logbx = logax ÷ logab
you can work out the value for b using, say natural logs (base e written loge or usually abbreviated to ln) since we know x=5 and logb5 = -1:
-1 = ln 5 ÷ ln b
⇒ ln b = -ln 5
⇒ b = e-ln 5
⇒ b = 1÷ eln 5
⇒ b = 1/5
Alternatively you can see it straight away:
b-1 = 1/b = 5
⇒ b = 1/5 = 0.2
ie log0.25 = -1
What else can I help you with?
Does a positive plus a negative equal a negative?
Not necessarily. 5 + (-6) = -1, a negative 5 + (-5) = 0 or 5 + (-4) = 1, a positive.
What does 5 to the negative one power equal?
5-1 = 1/5 or 0.2
What does positive 4 plus negative 5 equal?
4 + (-5) = -1
What does negative 1 plus positive 5 equal?
Positive 4
What does two times negative two minus a negative five equal?
2 * (-2) - (-5) = 1
Which is the log of 1 times 10-5?
Negative 5
Does a positive plus a negative equal a negative?
Not necessarily. 5 + (-6) = -1, a negative 5 + (-5) = 0 or 5 + (-4) = 1, a positive.
What does 5 to the negative one power equal?
5-1 = 1/5 or 0.2
What does 2 minus 3 equal?
-1 (Negative 1).
What is 5 to the negative 2 equal?
5-2 = 1/25. Expressed as a decimal, this is equal to 0.04.
What does positive 4 plus negative 5 equal?
4 + (-5) = -1
What does negative 1 minus 5 equal?
the problem changes to -1+(-5) so the answer is -6
What is 6 plus negative 1?
6 + (-1) positive and negative will equal negative. so it's 6-1 that would equal 5. positive and positive= positive positive negative= negative negative negative = positive negative positive= negative
Is log 5 equivalent to log 5-log 20?
No. log 20 is a positive number , so it you subtract it from log 5 you get less than log 5. However, log10 5 = 1 - log102 = 2- log1020 . or log 5 - log 20 = log 5 - log 4*5 = log 5 - (log 5 + log 4) = log 5 - log 5 - log 4 = - log 4 But we do not need to do all of these computations, because log 5 is different from log 5 - log 20 by the law of the equality that says two equals remain equal if and only if we subtract (in our case) the same thing from them.
What is 5 to the power of negative six?
it is equal to 1/5^6 which equals 0.000064
What decimal is equal to negative nine fifths?
You'll find that -1.8 is equal to negative nine fifths. Let's step through it. -9/5 = -(5/5 + 4/5) = -1 4/5 = -1 8/10 = -1.8
What does negative 1 plus positive 5 equal?
Positive 4
