If 3.n=1,then n is the

multiplicative
additive identity
multiplicative inverse
multiplicative identity

3 * N = 1

The multiplicative inverse is just the reciprocal of the number. The reciprocal is just " flipping " the number. So the reciprocal of 3 (or 3/1) is 1/3. And any time u multiply a number by its multiplicative inverse (reciprocal), the result is 1

3 * 1/3 = 3/3 = 1so N is ur multiplicative inverse

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Can you provide the tape diagram?