1. What is the 99th digit to the right of the decimal point in the decimal expansion of (1+√2) to the power 500? (Calculator not required.) (In case this isn't displayed correctly by your browser, the expression is (1+sqrt(2))^500, where sqrt(2) means the positive square root of 2.
2. Here are two messages enciphered using substitution ciphers. What do they say?
a) PREEZ LAEDHKPFH FSO AFYYZ SRT ZRFE!
b) RIFFY SRPWUZQIU! OWURWVM YAE I MAAX RALWXIY!
给出方法!
