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[tex]( \frac{7}{5} ) ^{8} \times ( \frac{7}{5}) ^{1} \div ( \frac{7}{5}) ^{7} -( \frac{13}{10}) ^{2} [/tex]
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Răspuns :

Răspuns:

Explicație pas cu pas:

Vezi imaginea CSTOANA09

[tex]\it \Big(\dfrac{7}{5}\Big)^8\cdot\Big(\dfrac{7}{5}\Big)^1:\Big(\dfrac{7}{5}\Big)^7-\Big(\dfrac{13}{10}\Big)^2=\Big(\dfrac{7}{5}\Big)^{8+1-7}-\Big(\dfrac{13}{10}\Big)^2=\Big(\dfrac{7}{5}\Big)^2-\Big(\dfrac{13}{10}\Big)^2=\\ \\ \\ = \dfrac{^{4)}49}{25}-\dfrac{169}{100}=\dfrac{196-169}{100}=\dfrac{27}{100}=0,27[/tex]