Question

plz someone say how 1/2√x²-1 comes in the 3rd step...​

Answer 1

Explanation:

see there is a power (-1/2)

I am writing again with understanding way only I took last one in 2nd step and 3 rd

where in 2nd step

=> 1/2(x²-1)^(-1/2)

where (x²-1)^-1/2 can be written as

1/(x²-1)^(1/2)

=> 1/(2(x²-1)^1/2) _______1

where √x can be written as x^1/2 so apply the same above equation equation 1

=> 1/2√(x²-1)

hope u understand