Question

how to find the unit digit of the given exponential form having the odd power?​

Answer 1

Step-by-step explanation:

Divide the exponent 'y' by 4.

Step1 If the exponent y is exactly divisible by 4. i.e, y leaves a remainder 0 when divided by 4. Then, the units digit of is 6, if l = 2, 4, 6, 8. the units digit of is 1, if l = 3, 7, 9.

Step 2 If y leaves a non-zero remainder r, when divided by 4 (i.e y = 4k + r). Then, the units digit of =