Question

/ If m is any positive integer, then the last
two digits in the expressions (81)(121)-1 are
(a) 02
(b) 12
(c) 21
(d) 00​

Answer 1

Step-by-step explanation:

Given expression (81)m (121)m – 1 if we put m = 1 81 × 121 – 1 = 9801 – 1 = 9800 If m = 2 6561 × 14641 = 96059601 – 1 = 96059600 Now, we consider in all case of m, the last two digit in the expression is 00.

correct answer is (d) 00.