Given x+1/x=2cosy then find x^n +1/x^n, Mathematics

Here we know x can only be 1 or -1. so if it is 1 ans is 2.

if x is -1, for n even ans will be 2

if x is -1 and n is odd ans will ne -2.

so we can see evenfor negative x also ans is 2 while sgn you were using would give ans -2 so you can see 2 sgn(x) is wrong.

so ans will be 2 ecxept when x is -1 and n is odd then it will be -2.

Posted Date: 3/12/2013 12:56:14 AM | Location : United States







Related Discussions:- Given x+1/x=2cosy then find x^n +1/x^n, Assignment Help, Ask Question on Given x+1/x=2cosy then find x^n +1/x^n, Get Answer, Expert's Help, Given x+1/x=2cosy then find x^n +1/x^n Discussions

Write discussion on Given x+1/x=2cosy then find x^n +1/x^n
Your posts are moderated
Related Questions
E1) Can you give some more examples of the spiral development of the mathematics curriculum? E2) A Class 3 child was asked to add 1/4 + 1/5. She wrote 2/9. Why do you feel this

One-to-one function: A function is called one-to-one if not any two values of x produce the same y.  Mathematically specking, this is the same as saying,  f ( x 1 ) ≠ f ( x 2

The logarithm of a provided number b to the base 'a' is the exponent showing the power to which the base 'a' have to be raised to get the number b. This number is defined as log a


maths projects for class 11

Total Contribution per Year for next 10yeras =$1000+$800 =$1800 So Total Future fund Vaule  =$1800*(1+1.073+power(1.073,2)+ power(1.073,2)+ power(1.073,3)+ power(1.073,4)+ power

area of curve

If a+b+c = 3a , then cotB/2 cotC/2 is equal to


how to make a venn diagram?