Question

if a minus 1 by a is equal to root 5 find the value of a + 1 by a​

Answer 1

Answer:

Step-by-step explanation:

a-1/a = √5

a√5 = a-1

a√5 - a = -1

a(√5 - 1) = -1

         a   = -1/√5 - 1 (or) 1/1-√5

Now, a+1/a = 1/1-√5+1 by 1/1-√5

        = 1+1 -√5/1-√5 by 1/1-√5

         = 2- √5/1 [∵ both denominators(1-√5) gets cancelled]

         = 2 - √5