Question

show that 9th cannot end with digit zero for any natural number n​

Answer 1

Answer:

Step-by-step explanation:

9 × 9 = 81 ends with 1

9 × 9 × 9 = 729 ends with 9

and so on. Thus

9^n will always end with 9 for odd n

9^n will always end with 1 for even n