5/20 shamyl This question has not been answered yet! Don't worry! You can check out similar questions with solutions below 20 . D i f f e r e n t i a t e 2 x - 1 2 x + 1 w i t ... 20(a) 20(b) ... बचà¥à¤šà¥‡à¥¤ बचà¥à¤šà¥‡ à¤à¥€ केवल 20 ... 20