Question

若x^a÷x^b=x，則a，b的關(guān)系為（　�。�

A．a(chǎn)=b

B．a(chǎn)=-b

C．a(chǎn)-b=1

D．a(chǎn)-b=-1

Answer 1

∵x^a÷x^b=x^a-b，x=x¹，
∴a-b=1，
故選C．