Need serious help in Algebra! PLEASE HELP?

Question

anonymous · Answer

attachment

tsyana · Answer

here to help

tsyana · Answer

first you need to find the terms in the first quation make sense?
if not guess and i'll tell you if you got it right

anonymous · Answer

I'm new to this so I'm not sure how to solve any of it... ^^;;

anonymous · Answer

to find the number of term, you must understand the sign sum$$\sum_{n=1}^{5}$$ means your term starts from the 1 to 5 term. that means you have 5 terms. do you got it? now tell me what the number of term you have in problem2

anonymous · Answer

I am here to help you get what you don't understand or what you try but get nothing, not to give you the answer. if you don't try, sorry , I cannot help

anonymous · Answer

Sorry I had to step away for a while, that means we have 8 terms in the second one right?

anonymous · Answer

yes. back to the first problem, if n=1 , it means you calculate the first term, replace n=1 into the equation you have to get the value of the first term. tell me the result