Question

If x=5-√21÷2 then show {x^3+1÷x^3 }-5{x^2+1÷x^2}+{x+1÷x}=0

Answer 1

Answer:

Note: See Attachments For Answer!

Step-by-step explanation:

>>First of all we need to find reciprocal of x

>>Which is 2/(5-√21)...

>>Now multiply denominator with its conjugate

>>>On simplying we get 1/x= (5+√21)/2.

>>Now find the x +1/x.

>>As solved in Given picture.....

>>We get 5...

>>>Now see the picture for further solution.