• Apr 15th 2014, 10:45 AM
pexterra
I can do some of the problems on this, but some I can't figure out. The answers on these listed I am getting wrong, I covered up the ones I know. I am obviously making a mistake typing them in my calculator. The ones with the e not in the exponent but the base, I can't figure out how to enter that. I use 2nd-LN for e^.

Any help? My calculator is a ti-30

http://i.imgur.com/khUt5yK.jpg

http://i.imgur.com/XBE2yhK.jpg

http://i.imgur.com/ibuAi5O.jpg
• Apr 15th 2014, 12:13 PM
ebaines
Is that a "Reverse Polish Notation" (RPN) calculator? I see an Enter button and no equals sign, so I'm guessing it is. You say it's a TI-30, but those were made back in the mid-70's.

Anyways, to use RPN you always start deep in the formula and work your way toward the outside, as opposed tp left-to-right as on a "normal" calculator. So for $e^{5 \sqrt 2-2 \pi}$ start with the square root, then multiply by 5 then do the 2 pi calculation, then subtract that result from the first, then "exponentiate" the result. The sequence is:

2 2nd x^2
5 X
2 Enter
Pi X
Minus
2nd LN
• Apr 15th 2014, 12:33 PM
pexterra
Quote:

Originally Posted by ebaines
Is that a "Reverse Polish Notation" (RPN) calculator? I see an Enter button and no equals sign, so I'm guessing it is. You say it's a TI-30, but those were made back in the mid-70's.

Anyways, to use RPN you always start deep in the formula and work your way toward the outside, as opposed tp left-to-right as on a "normal" calculator. So for $e^{5 \sqrt 2-2 \pi}$ start with the square root, then multiply by 5 then do the 2 pi calculation, then subtract that result from the first, then "exponentiate" the result. The sequence is:

2 2nd x^2
5 X
2 Enter
Pi X
Minus
2nd LN

here is a better picture. i don't think it's from the 70's because I got it from staples a couple weeks ago. probably i just named it wrong. there is an equal sign under enter. it just got cut out of the picture.

http://i.imgur.com/agV7wXE.jpg
• Apr 15th 2014, 12:36 PM
pexterra
but hey! i think i got the ones without the e in the exponent down. all i have left i think are the ones with the e's in the exponents. i can't seem to find out how to put the e there though?
• Apr 15th 2014, 12:37 PM
ebaines
Never mind my previous post - I figured out what you have is a TI-30XIIS calculator: TI-30X IIS - Key features by Texas Instruments - US and Canada

It is not RPN, so what you can do is this:

$5 \times 2\ 2nd\ x^2 + 2 \times \pi \ = \ 2nd \ \ln$
• Apr 15th 2014, 12:40 PM
ebaines
Our posts overlapped...

Remember that e = e^1. So to get e use: 1 2nd LN
• Apr 15th 2014, 01:08 PM
pexterra
hold on, trying it now
• Apr 15th 2014, 02:01 PM
pexterra
To calculate: $10^{3e-4 \sqrt 3 }$ try this:
10^(3 x 1 $e^x$ - 4 x 3 $\sqrt {}$ )