Question

a= (-3)²⁵:3²²+2⁴⁰:16⁹+5

b=$(\frac{2 }{5} - \frac{1}{7} ) \div ( \frac{1}{7} + \frac{1}{2} - \frac{3}{5} ) \times \frac{1}{72}$
Dau coroană!​

Answer 1

Răspuns:

• $a = - 6$
• $\frac{1}{12}$

Explicație pas cu pas:

$a = {( - 3)}^{25} \div {3}^{22} + {2}^{40} \div {16}^{9} + 5 \\ a = { - 3}^{3} + {2}^{4} + 5 \\ a = - 27 + 16 + 5 \\ a = - 6$

$b = ( \frac{2}{5} - \frac{1}{7} ) \div ( \frac{1}{7} + \frac{1}{2} - \frac{3}{5} ) \times \frac{1}{72} \\ b = \frac{9}{35} \div \frac{3}{70} \times \frac{1}{72} \\ b = \frac{9}{35} \times \frac{70}{3} \times \frac{1}{72} \\ b = 3 \times 2 \times \frac{1}{72} \\ b = 2 \times \frac{1}{24} \\ b = \frac{1}{12}$