why use -0.4 ∆o and +0.6∆o value in case of CFSE|| IIT, NEET, CBSE, ICSE, KVPY,CLASS12,B.sc

[@AliRaza-xx2ge]

Dear sir last point ni smjh I aap na 0.6 kaisa derive kia something is missing. Plz clear my doubt.

[@chetantanwar1380]

👍best sir

[@sanjurao7825]

Mst guru g

[@akshaythoriya2001]

Thank you for solving this doubt👏

[@rajpalyadav8132]

Awesome👏✊👍 sir

[@muneerhussaindar]

Thank you for clearing my doubt