1. It is observed that the numerator is the original number and the denominator is the square of the original number minus 1, so a = 10 and b = 10 ∧ 2- 1 = 99.

2.=2∧99× 10 1

3. The law of distribution 2∧99

4.A = 0 Any number whose power of 0 is 1.

Limited ability, can only help here.

I hope to adopt it and give a compliment.