Sum of two One-One Functions may not be One-One. For pdf notes, follow our Telegram and WhatsApp Channel 👇🏼 Playlist link: Complete lectures on .Relations and Functions Class 12 Complete lectures on Relations and Functions Class 11 Complete lectures on Sets. Thanks for watching 🙏 #binaryoperations #composition #relationandfunctions #relationandfunction #oneonefunction #ontofunction #injectivefunction #surjectivefunction #bijectivefunction #exam #education #mathematics #class12 #maths #ncert #ncertmath #jacboard #stateboard #cbse #cbseboard