Question

punctul a cred ca i corect ,dar la b nu gasesc greseala ​

Answer 1

Explicație pas cu pas:

$\left(2 - \frac{1}{2} \right)\left(3 - \frac{1}{3}\right)\left(4 - \frac{1}{4} \right):15 = \\ = \left(\frac{4 - 1}{2} \right)\left(\frac{9 - 1}{3}\right)\left(\frac{16 - 1}{4}\right):15 \\ = \left(\frac{3}{2} \right)\left(\frac{8}{3}\right)\left(\frac{15}{4}\right):15 = 1$