Question

plz tell me sir...how to give this step

Answer 1

Hope this answer helps you...

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Answer 2

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This step comes up by using Reduced method and CommOn method.

ACCORDING TO THE QUESTION;

3^20 +3^21+3^22+3^23


CommOn 3^20 =) 3^20×(3^21-20)+(3^20-23)

3×3¹×3^-3...


Hope it's helpful for you...


Thanks!!!!