Math, asked by samrutha14, 3 months ago

Last two digits of 7 power 2021

Answers

Answered by ItzPrabhjotKaur

1

Answer:

Case 2: Units digit in x is 3, 7 or 9

When x ends in 9. ...

Raise the base by 2 and divide the exponent by 2 => ...

Number ending in 9 raised to 2 ends in 1 => ...

When x ends in 3. ...

Raise the base by 4 and divide the exponent by 4 => ...

Number ending in 3 raised to 4 ends in 1 => ...

When x ends in 7.

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