Question:How come there's no ANTILOG on a scientific calculator? For example, if I use a printed out LOGARITHM TABLE then I can look up the logs and add/subtract them, then find out the actual number by looking up the reverse of the logarithm. But I only see the LOG button on calculators and never the anti log or reverse log (unlike Sin and Sin-1, etc.). Why is this? Hits palm on head (palm, not Palm :-) You're absolutely right! Sheesh. I totally just overlooked that. Thanks. I use RPN as well (can't stand so-called algebraic). All my real and iPhone/iPad/Mac calculators are RPN :-) Thanks!

Answers:Depends on the calculator. The Windows calculator can do base10 anti-log of x by entering: x, inverse, log. My HP just does the same anti-log by entering: 10, x, y^x (it's an RPN calculator). Since space is limited on a calculator, the designers must optimize for the functions they expect to be most useful. I guess since y^x or x^y function is really, really useful and can return the same result, some opt not to add redundant inverse log or anti-log function for the benefit of people who don't quite understand what a log is.

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Question:In my book it is given that above is equal to log 4 to base 2. How come. I have proved log a log b = log ab This stuff simple dives over me. I mean can u prove anythin like that?

Answers:It appears that they used the "chage of base" formula that says the log a to the base b = (log a) / (log b) so you can rewrite this problem as (log 4) / (log 5) * (log 5) / (log 2) when you multiply, the log 5 on top will cancel with the log 5 on bottom leaving (log 4) / (log 2). if you take that answer and use the change of base formula again, you will get log 4 with a base of 2 which is actually just 2. I hope this helps and wasn't too confusing, Rousey

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Question:Given f(x)=log (base 2) (-x+5) and g(x)=-x Find (f+g)(x) y=log(base 2)(-x+5)-x I don't know how to turn that into an equation from which I can graph

Answers://// log(2)(-x+5)-log(2)2^(-x) =log(2)(-x+5)/2^x

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Question:log (3) x How do i find these 2 points outside of using a calculator

Answers:So the equation is log (3) x More specifically y = log (3) x So if you rewrite the equation to... 3^y = x it'll make it SOO much easier for us.. From that, we can plug in any number we want for y, and we will get a value for x, and those values are on the function. But.. if you want to make your life easier, juse use 1,2 for y... So if we plug in 1 for y, we get 3^1 which is just 3 so the cordinate (3,1) is on the function Plug in 2 for y, we get 3^2, which is 9 so the cordinate (2,9) is on the function. ^^

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