Question

PLEASE HELP WILL MEDAL!!! (ans. must be correct)

The imaginary monster Dracula is 574 years old, according to legend. Since that very first birthday long ago, when he happily blew out 1 candle on a cake decorated with drippy red frosting, how many birthday candles has he blown out in his whole horrifying life? Assume that Drac has always blown out exactly n candles on his nth birthday.

Answer 1

Okay this is going to take me a while to figure out

Answer 2

first of all horrible one :P
now tell me what is the formula of the sum of an AP series? do u know

Answer 3

a is 1 and d is 1 and sum of 574 terms

so Sn = n/2(2a +(n-1)d)
Sn= 574/2(2+574-1)
Sn = 287 (575)

= 165025

Answer 4

\[oSn = n/2[2a +(n-1)d]\]

Answer 5

The picture kills me. I am trying to figure out if he just keeps blowing out the same amount of candles over the years then it should be how old he is? I can't explain what I am trying to say

Answer 6

@ineedhelp143 please stop this help him to learn do give the answer away

Answer 7

I gave the steps to solve it

Answer 8

so are u familair with AP series

Answer 9

He did. But no I do not know that series

Answer 10

first u have to go through some literature about arithmetic progression unless u will not understand

Answer 11

ah, well thanks

Answer 12

^_^