Question

If y+1/y =3 then find the value of y5+1/y5=??? Solve this question

Answer 1

Answer:

Step-by-step explanation:

Y+1/y=3

5y+1/5y

Y+1=3y

1/2=y------------- 1 -

Sub y in another equation

5/2+1/5/2

Take LCM

5+2/2/5/2

7/2/5/2

2gets canceled

7/5 is the ans

Answer 2

Answer:

Step-by-step explanation:

y + 1/y = 3 is given

So, by using the formula (n^2 -2) (n^3 -3n) -n

We can easily find the answer

Here, n = 3

Because y+1/y = 3

So,

=(3^2 -2) (3^3 -3*3) -3

=(9-2) (27-9) -3

=7*18 - 3

=126 -3

= 123 (answer)