giving a medal and a fan!!!!
Write the sum using summation notation, assuming the suggested pattern continues.

Question

giving a medal and a fan!!!!
Write the sum using summation notation, assuming the suggested pattern continues.

mayaal · Answer

options for answers are attached

mayaal · Answer

attachment

dangerousjesse · Answer

So tiny..

mayaal · Answer

what do u mean?u can't see the options?

dangerousjesse · Answer

No, I can see them haha. I think it's funny how small they are.

mayaal · Answer

ok,can u try to open them in the new tab and then zoom in?

dangerousjesse · Answer

Yeah, I went ahead and opened them in paint. It's fine :)

mayaal · Answer

ok:)

mayaal · Answer

@ganeshie8  @amistre64  @satellite73

mayaal · Answer

@DangerousJesse  do u know how 2 do this one?

mayaal · Answer

@amoodarya

amoodarya · Answer

yes 
but what is the question  ?

dangerousjesse · Answer

I just don't understand this, namely because $$\infty $$ is a concept, not a numerical value..

mayaal · Answer

the question is:
Write the sum using summation notation, assuming the suggested pattern continues.

-8 - 3 + 2 + 7 + ... + 67

dangerousjesse · Answer

Oh that actually makes sense

mayaal · Answer

options for answers are attached

dangerousjesse · Answer

You're adding five every time.

mayaal · Answer

i forgot to copy the question.sorry guys!

amoodarya · Answer

a1=-8
a2=-3
a3=+2
...
so they are arithmetic sequence

amoodarya · Answer

and 
an=a1+(n-a)d
so a2-a1=5
 so 
an=-8+5n 


an=67
-8+5n=67 ---> n=15
  so 
  sigma (0 to 15) (-8+5n)

mayaal · Answer

how did u find out that an=-8+5n

amoodarya · Answer

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