Question

Yilin

求算式~~

人2? 平方開的)

若3X5X17X257三4一1'則之值為多
履?                         【臺北興雅】

全:

Answer 1

Choosen As Best Answer

Cobe

3*5=(4-1)(4+1)=4²-1

17=4²+1

257=4⁴+1

(4²-1)(4²+1)(4⁴+1)=4^8-1

n=8

Yilin

謝謝解答

Cobe

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