Determine whether the following is valid or invalid:
In a class like this,it's necessary to work a lot of problems on your own in order to be familiar with the material,and such familiarity is necessary to do well on the exams.So if you work a lot of problems on your own,you'll do well on the exams.

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The Answer of Determine whether the following is valid or invalid:
In a class like this,it's necessary to work a lot of problems on your own in order to be familiar with the material,and such familiarity is necessary to do well on the exams.So if you work a lot of problems on your own,you'll do well on the exams.

Determine Whether the Following Is Valid or Invalid