Question

Va rog ex 7 și 8 am nevoie urgent, mulțumesc ​

Answer 1

ex7

$\: a) \frac{n + 2}{12} = \frac{7}{3}$

$3 \times (n + 2) = 84$

$n + 2 = 28$

$n = 28 - 2$

$n = 26$

$b) \frac{7}{2n} = \frac{28}{24}$

$\frac{7}{2n} = \frac{7}{6}$

$2n = 6$

$n = 3$

ex8

$a)( \frac{3}{2} ) {}^{17} \times ( \frac{3}{2} ) {}^{9} \div ( \frac{3}{2} ) {}^{22}$

$( \frac{3}{2}) {}^{4}$

$\frac{81}{16}$

$b)( \frac{17}{2} ) {}^{13} \times ( \frac{8}{17} ) {}^{13} \div 4 {}^{13}$

$( \frac{17}{2} \times \frac{8}{17} \div 4) {}^{13}$

$(4 \times \frac{1}{4} ) {}^{13}$

$1 {}^{13}$

$1$