Math, asked by 13amankuar, 1 month ago

C) Simplify and Express with positive exponents.
1) (7)3 x (7)-5​

Answers

Answered by hemanthvadapalli123
2

Question:-

Simplify

 {(7)}^{3}  \times  {(7)}^{ - 5}

Solution:-

We have,

 {a}^{m}  \times  {a}^{n}  =  {a}^{m + n}

So,

 {7}^{3}  \times  {7}^{ - 5}  =  {7}^{3 + ( - 5)}

 =  >  {7}^{3 - 5}

 =  >  {7}^{ - 2}

We have,

  {a}^{ - m}  =   \frac{1}{ {a}^{m} }

So,

 {7}^{ - 2}  =  \frac{1}{ {7}^{2} }

 =  >  \frac{1}{49}

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