Question

if n is a natural number then find the ending digit of 9n-5n​

Answer 1

Answer:

9n-5n=4n.

so ending digits are 4,6,2,8,0

Answer 2

9ⁿ - 5ⁿ  ending digit  4  for odd n   &  6 for even n

Step-by-step explanation:

9ⁿ - 5ⁿ

5ⁿ  will always end with 5

9ⁿ will end with  9  for odd n   &  1  for even n

9 - 5 = 4   for odd n

1 - 5  = 6  for even n

9ⁿ - 5ⁿ  ending digit  4  for odd n   &  6 for even n

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