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sashaice [31]
2 years ago
9

Simplify the expression. Help asap

Mathematics
2 answers:
nadezda [96]2 years ago
8 0

Answer:

{ \tt{ \frac{ {(r}^{3} ) {}^{4} }{( {r}^{3} ) {}^{8} } }} \\

» Let r³ be x:

= { \tt{ \frac{ {x}^{4} }{ {x}^{8} } }} \\

» From law of indices:

{ \boxed{ \pmb{ \green{ \frac{ {a}^{m} }{ {a}^{n} } = {a}^{(m - n)}   }}}}

» Taking a comparison from the question;

  • a is x
  • m is 4
  • n is 8

{ \tt{ \frac{ {x}^{4} }{ {x}^{8} } =  {x}^{(4 - 8)}  }} \\  \\ { \underline{ \tt{ \:  =  {x}^{ - 4}  \: }}}

» Substitute for x as r³:

{ \tt{ = ( {r}^{3}) {}^{ - 4}   }} \\  = { \tt{( {r)}^{(3 \times  - 4)} }} \\  = { \tt{ {r}^{ - 12} }} \\  \\ { \boxed{ \mathfrak{ answer :  \: { \tt{ \red{ \:  \frac{1}{ {r}^{12} } }}}}}}

katrin [286]2 years ago
7 0

\large \mathfrak{ \frac{(r ^{3} )^{4} }{(r ^{3})^{8}  } }

Simplify the expression by multiplying exponents

\large \mathfrak{ \frac{r^{12} }{r ^{24} } }

Simplify the expression by cancelling the terms

\large \mathfrak{ \frac{1}{r ^{12} } }

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