To prove an identity you have to use logical steps to show that one side of the equation can be transformed into the other side of the equation. From algebra you are familiar with the distributive property. By sandwich theorem d tends to zero as n tends to infinity hence x1n tends to 1.
From algebra you are familiar with the distributive property.
This means that zero is both 0 and -o so there isnt really a reason to write it out like that. To help students construct their own proofs this new edition. Math Academy is a summer math program on mathematical proof for talented high school students making the challenging transition from solving computational problems to writing rigorous proofs. Make studying math a priority.