Recent content by melissax

I uploaded question this is not a homework i just trying to understand how we decide to the boundaries of covergence. Also i don't know how i can write mathematicaly here. Lim n->inf |((n+1)^(3)*(x-5))^(n+1)/(n^(3)*(x-5)^n) Lim n->inf |(x-5)*(((n+1)/n)^3)| after x-5 this part equal to the...

Hello, My question is about power series. In most of questions i can find points with ratio test. But when i check points i can't understand style of parenthesis. Is there easy way? For example:\sum(n^(3)*(x-5)^n) I found check points 4<x<6 How can i decide to the parenthesis will be...

question is "2cos(x)+ 5sec(x)=1.1" problem isn't wrong. Correct but can you help to solution?

Hi, may you help me? I have a question I solved but couldn't ended. If cos(x)+5Sec(x)=1.1 then Cos(x)=? 2Cos(x)+5Sec(x) =11/10 2Cos(x)+5/Cos(x)=11/10 2Cos(x)*Cos(x)+5=11/10*Cos(x) 2Cos^2(x)+5=11/10*Cos(x) 2Cos^2(x)-11/10-Cos(x)-5=0 then i used delta=b^2-4ac then i found delta=-4.79...

re: Finding the Range of a Trignometric Function I am sory. You showed me path but i wrote wrong. When i solved second then i saw? Thank you. You are great teacher.

Re: Which one isn't function? should i give value to the x? If i give can i understan is function or not?

re: Finding the Range of a Trignometric Function -1<=5*Cos(x)+3<=1 -5<=5*Cos(x)+3<=5 -5-3<=5Cos(x)<=5-3 -8<=5Cos(x)<=2 As i understand between -2 and 8 but how i can show?

re: Finding the Range of a Trignometric Function Thank you very much You showed me path, i will apply.

Hi, I have a question and couldn't solve. Can you help me? Which one isn't function how i can show? (a) y = |x^3 + 5| (b) y = x2 + sqrt(x) -sin(x) (c) y2 = (x-5)^2 + 10 (d) y3 = x + 4 Thank you?

Hello, I have some questions and i couldn't solve them can you help me? If y=5cos(x)+3 then what is the heap of ? (a) All real numbers (b) alpha<= y <= alpha (c) -2 <= y <= 10 ( d)-2 <= y <= 8 What is the solution? Thank you.