According to Taruner Swapna Scheme of West Bengal Government, backward / economically disadvantaged students of West Bengal can receive financial aid and devices like Smartphones / Tablets for digital learning, bridging the digital gap and supporting online studies. Rohan who resides in Purulia district of West Bengal received a tablet and he decided to complete his education through e-learning. One day he was studying number system, where he learnt about rational and irrational numbers, etc. He was particularly interested in irrational numbers like 7 + . Based on the above information, answer the following : (i) What is the rationalising factor of 7 + ? (ii) What is the reciprocal of 7 + ? Are rationalising factor and reciprocal same? (iii) If x = 7 + , then find the value of .