Quiz about Verifica proprietà delle potenze

Question 1

$$-\left[\left(-\frac{3}{4}\right)^{-3}:\left(-\frac{3}{4}\right)^{-2}\right]^{-2}=$$

Accepted Answer

$$-\frac{9}{16}$$

Answer

$$\frac{9}{16}$$

Answer

$$-\left(-\frac{3}{4}\right)^{10}$$

Answer

$$\left(+\frac{3}{4}\right)^{10}$$

Question 2

Il numero 0,0017 in notazione scientifica, si scrive:

Accepted Answer

$$1,7 imes10^{-3\ }$$

Answer

17

Answer

$$1,7 imes10^3$$

Answer

$$17 imes10^{-4}$$

Question 3

Per quale valore di k si ha che $$\left(+\frac{8}{5}\right)^{-k}=+\frac{25}{64}?$$

Accepted Answer

k=2

Answer

k=-2

Answer

k=1

Answer

k=0

Question 4

Siano a e b due numeri naturali diversi da zero con a>b. Allora:

Accepted Answer

$$\left(\frac{b}{a\ }\right)^{-1}>\left(\frac{a}{b}\right)^{-1}$$

Answer

$$\left(\frac{b}{a\ }\right)^{-1}<\left(\frac{a}{b}\right)^{-1}$$

Answer

$$\left(\frac{a}{b} ight) imes\left(\frac{a}{b} ight)^{-1}<1$$

Answer

$$\left(\frac{a}{b}\right)<\left(\frac{b}{a}\right)$$

Question 5

Quanti secondi ci sono nel mese di aprile?

Accepted Answer

$$2,6 imes10^6$$

Answer

$$2,6 imes10^{5\ }$$

Answer

$$2600$$

Answer

$$26000000$$

Question 6

Quanti chicchi ci sono nella nona casella della scacchiera del Faraone?

Accepted Answer

256

Answer

512

Answer

128

Answer

9

Question 7

$$\left\{\left[\left(-1\right)^{-1}\right]^{-1}\right\}^{-1}=$$

Accepted Answer

-1

Answer

1

Answer

0

Answer

3

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