Question

please help me to solve this problem
please,,,
$(1 \ - \frac{1}{a}) {}^{3}$
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Answer 1

Answer:

$(7) {(1 - \frac{1}{a} )}^{3} = 0\\ =(7) {(\frac{1a - 1}{a} )}^{3} = 0\\( 7) {(\frac{1 {a}^{3} - 1}{ {a}^{3} } )} = 0 \\ \frac{7 {a}^{3} - 7 }{ {a}^{3} } = 0 \\ 7 {a}^{3} - 7 = {a}^{3} \\ - 7 = {a}^{3} - 7 {a}^{3} \\ - 7 = - 6 { a}^{3} \\ \frac{ - 7}{ - 6} = {a}^{3} \\ \frac{ 7}{ 6} = {a}^{3}$