Thread: Problem Wth Logarithm

I've a problem getting the answer for this question using scientific calculator....

2(lg4)^2


The answer I obtained is different from the textbook answer.

Hope someone can help me on this. Thanks.

Do you want the decimal or a simplified form of the logarithm?

In decimal. Thanks.

Well, your problem is probably due to the confusion between log base e and base 10. Base e is symbolized as "ln" on your calculator, while base 10 is symbolised as "log"

for the question, do you mean

or ?

And in what base are those logs?

The first one....

2(lg4)^2


That is exactly the question shown.

For log base 10,

= 0.724952...

For log base e

= 3.843624...

I've scanned the questions from the textbook. Questions a) and b), I have no problem. But questions c), d) and f) are problems.

Thanks GUSBOB. But the answers are still incorrect. Wondering the text book has wrong answers.