Sir/Ma'm, I have a query that if xx = 0 => x = ? I am joy, a teacher teaching Maths at the secondary level and while solving a sum came to this stage when i got xx (1 + log x) = 0, by which we can conclude that xx = 0 or 1 + log x = 0. If xx = 0, than what should be the value of x? I feel that the value of x should then be 0 (zero) but then how do I explain this to the students as we also know that anything to the power of 0 is 1 but here 0 raised to 0 is 1. If this is not defined then how do I explain this ? Please help me as i have got to explain this to the children. Thank you. Truly yours, Joy Hi Joy, In an answer to a previous question about 00 the conclusion is that it is best to leave 00 undefined. In your problem, however, the status of 00 is not an issue. Since log x is only defined for x positive, your expression xx (1 + log x) is only defined for x positive. When x is positive xx is also positive so the only solution to xx (1 + log x) = 0 is the solution you found by solving 1 + log x = 0. Cheers, Penny Go to Math Central