∵a⊗b=a(1-b),
①2⊗(-2)
=2×[1-(-2)]
=2×3
=6
故本选项正确;
②a⊗b
=a×(1-b)
=a-ab
b⊗a
=b(1-a)
=b-ab,
故本选项错误;
③∵a⊗b=a(1-b)=0,
∴a=0错误.
故本选项错误.
故答案为:①.
∵a⊗b=a(1-b),
①2⊗(-2)
=2×[1-(-2)]
=2×3
=6
故本选项正确;
②a⊗b
=a×(1-b)
=a-ab
b⊗a
=b(1-a)
=b-ab,
故本选项错误;
③∵a⊗b=a(1-b)=0,
∴a=0错误.
故本选项错误.
故答案为:①.