- Education and Science
Maths - How to use SIGMA Notation - Manually and with a TI Calculator
So hopefully by the end of this you will understand how to use sigma if it ever comes up when you’re doing some maths at school or UNI. It’s quite common in UNI and if you’re like me and your brain isn’t built for maths hope this helps. Have a graphics calculator really speeds up the process to so I will go through how to enter an equation into your calculator. Most people use ti calculators so I will give a little example on how to use sigma on a ti calculator.
Sigma is simply an abbreviation or handy way to notate long sums.
0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 would be in sigma notation ( i = 0 ) at the bottom and 7 at the top of sigma
So the next step is to plug in every value for ( i ) into the term right of the sigma symbol and adding them up.
Another helpful explanation is The sum ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 +10 + 11 + 12)
If you got this far and your still confused that’s alright I was ready to run out of the room screaming. Here's another example that should make it click for you
From the above picture we see a 5 above the sigma sign a (i = 0 ) below and ( i^2) to the side. The 5 on the top denotes how many numbers you will sum together, The i^2 denotes that you must square each value from zero to five and the ( i = 0) tells you the number you will start at in this case 0.
SIGMA on the Calculator
SUM can be found by pressing 2nd STAT (LIST)
-> MATH #5 sum
SEQ can be found by pressing 2nd STAT (LIST)
-> OPS #5 seq
Hooray the end
that's it for the hub:) hope you enjoyed it probably didn't unless you needed to know how to use sigma but i hope it helps those who do.