Question

daca a/5=4/b, bnu este 0, atunci a*b =

Answer 1

Răspuns: $\red{\boxed{\bf a\cdot b = 20}}$

$\bf\dfrac{a}{5}= \dfrac{4}{b} \xrightarrow[~cu ~produsul~ extremilor~]{~produsul ~mezilor~}a\cdot b = 4\cdot 5 \implies \red{\boxed{\bf a\cdot b = 20}}$

Answer 2

Răspuns:

a/5=4/b

ab=4·5=>ab=20