can someone please explain sigma notation?

Question

anonymous · Answer

sigma is the symbol used to represent sums

anonymous · Answer

yeah, but what do all the numbers floating about mean...

anonymous · Answer

what does the top number mean?

anonymous · Answer

It's for summation

anonymous · Answer

what about the bottom
and the side?

anonymous · Answer

sigma is the symbol used to represent summation given specific intervals..that is from one value to another value i.e lower value to up[er value the summation has to be carried

maheshmeghwal9 · Answer

$$\sum_{n=1}^{10}({n+1})$$I means that u put the value of 'n' one by one upto 10 & add them all like: -$$(1+1)+(2+1)+(3+1).........$$

maheshmeghwal9 · Answer

so $$\sum_{?}^{?}= summing.$$

anonymous · Answer

what does the n=1 mean, and the 10 on top.
I understand that sigma is used in summation and sequencing, but i want to know what each place means

anonymous · Answer

Sigma notation is a concise and convenient way to represent long sums. For example, we often
wish to sum a number of terms such as
1 + 2 + 3 + 4 + 5
or
1 + 4 + 9 + 16 + 25 + 36
where there is an obvious pattern to the numbers involved. The first of these is the sum of
the first five whole numbers, and the second is the sum of the first six square numbers. More
generally, if we take a sequence of numbers u1, u2, u3, . . . , un then we can write the sum of these
numbers as
u1 + u2 + u3 + . . . + un .
A shorter way of writing this is to let ur represent the general term of the sequence and put
Xn
r=1
ur .
Here, the symbol  is the Greek capital letter Sigma corresponding to our letter ‘S’, and refers
to the initial letter of the word ‘Sum’. So this expression means the sum of all the terms ur
where r takes the values from 1 to n. We can also write
Xb
r=a
ur
to mean the sum of all the terms ur where r takes the values from a to b. In such a sum, a is
called the lower limit and b the upper limit.
Key Point
The sum u1 + u2 + u3 + . . . + un is written in sigma notation as
Xn
r=1
ur .

anonymous · Answer

http://www.mash.dept.shef.ac.uk/Resources/sigma.pdf

anonymous · Answer

refer to this link

anonymous · Answer

ohhh. so they are bounds

anonymous · Answer

thnx