# math - functions

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I compute (109/3)^1/4 and store that value in A.
Store 3 in P.
Now compute f(7)= Pa^7 by typing:

P x A x^y 7

***My problem is that I don't know WHERE the x^y key is on a TI -83 Plus.

Then I have to subtract this answer from the answer using a rounded value of a (which I found to be 1831.)The difference will show the error used by rounding a and will not be zero.

• math - functions -
• math - functions -

So I punched it in and the calculator reads:

P * A ^ 7
1613.078231

Did I do it correctly?

• math - functions -

Yes, I got the same answer.

The best way to check is to use numbers that you know, such as:
2^6=64,
2^20=1048576
3^4=81,
etc.

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