Math, asked by chavdaridham09, 3 months ago

plz ans fast it's urgent​

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Answered by 12thpáìn
2

 \sf {5}^{m}  \div  {5}^{ - 4}  =  {5}^{7}

 \sf \: On \:  Comparing  \: Both \:  Side \:  W e  \: get,

\sf   → m-(-4)=7

\sf  →  m+4=7

\sf  →  m=7-4

\sf  ~~~m=3        \\\\\\

 \sf \: \bf{Verification}  \:  5³÷5^-⁴=5⁷ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \\ \sf125 \div  \frac{1}{5 ^{4} }  = 78125  \\\sf 125 \times 625 = 78125 \\\sf  \:  \:  \:   \:  \:  \:  \: 78125 = 78125 \\\sf lhs = rhs \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{ \pink{proved}}\\\\\\\\

Laws of exponents

\sf {a}^{m} \times  {a}^{n}  =  {a}^{m + n}   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf {a}^{m}  \div   {a}^{n}  =   {a}^{m  -  n} \\  \sf{( {a}^{m} ) ^{n} =  {a}^{mn} \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: a {}^{m}  \times  {n}^{m}  = (ab) ^{m}   } \\   \sf{a}^{0}  = 1 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:   {\frac{ {a}^{m} }{ {b}^{m} }=  \left( \frac{a}{b} \right) ^{m} }\\\\

Answered by Hezal12
5

Hope it's helpful :) :) :) :) :)

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