Question

$( \frac{7}{5} ) ^{8} \times ( \frac{7}{5}) ^{1} \div ( \frac{7}{5}) ^{7} -( \frac{13}{10}) ^{2}$
Va rog ajutati-mă ​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

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