Question

a+1/a= 5 হলে a-1/a এর মান কত​

Answer 1

Answer:

(a-1/a) = 4.58257

Step-by-step explanation:

a+1/a= 5 হলে a-1/a এর মান কত​?

now , (a-b)^2 =  (a+b)^2  - 4ab [ that is : a^2 + b^2 -2ab]  

or , (a-1/a)^2 =  (a+1/a)^2  - 4*a*1/a

or , (a-1/a)^2 =  (5)^2  - 4*1

or , (a-1/a)^2 =  25-4 = 21

or , (a-1/a) = (21)^(1/2) = 4.58257

So , (a-1/a) = 4.58257