Question about Texas Instruments TI-30XA Calculator

# - log (1 x 10^14) / 2.0 my question is how do you punch this in to a TI-30XA calculator. Please help.

Posted by Anonymous on

### kakima

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1 EE 14 LOG / 2 +<>- =

Posted on Jun 27, 2010

### k24674

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Actually, you need no calculator to compute the value of the expression.
log (a*b^c)= log(a)+ log(b^c)=log(a) +c*log(b)
With a=1, b=10, c=14
log(1x10^4)=log(1)+14*log(10)
But as you well know, log(1)=0, log(10)=1
Your final result is -14/2 which is -7.

Posted on Jun 28, 2010

• k24674 Jun 30, 2010

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## Related Questions:

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The TI-30XA calculates logarithms to base e and base 10. You can calculate the log of x to any base b by calculating the logarithm of x and dividing it by the logarithm of b: log(x)/log(b) or ln(x)/ln(b).

Nov 29, 2013 | Texas Instruments TI-30XA Calculator

### Change log base

The 30XA only calculates logs to base e (LN) and base 10 (LOG). However you can calculate the log of x to any base b simply by calculating log(x)/log(b) or ln(x)/ln(b)

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The inverse of the common log function is the power function with base 10 (10^). It shares the same physical key as the log. You acees the function by pressing [2nd] [log]

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### How do you find the log of 9.01 using TI 30xA calculator?

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Use the relation log5(x) = log(x) / log(5) = ln(x) / ln(5)

LOG ( 1 / 625 ) / LOG 5 =

or

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Mar 11, 2010 | Texas Instruments TI-30XA Calculator

### How do i find the negative log on a TI-30Xa

Hi,

Ex: calculate -log(15.32)
1. Calculate the log 15.32 [LOG] [=] result 1.185258765
2. Then press the change sign key (-) result -1.185258765
You can also try 15.32 [LOG] (-) [=]. Try to veriufy it on your calculator.

Here is a picture of the change sign
Hope it helps

Dec 13, 2009 | Texas Instruments TI-30XA Calculator

### TI-30XA

Use the inverse log key sequences "2nd LN" or "2nd LOG" depending on whether you are using natural logs or logs to base 10

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