Question

quanto vale y, sendo y = 3 elevado x para:

a- x = 2

b- x = -1

c- x = 0

d- x = -2

Answer 1

$<var>y=3^x</var>$

a)$<var>y=3^2=9</var>$

b)$<var>y=3^{-1} => y=\frac{1}{3}</var>$

c)$<var>y=3^0=> 1</var>$

d)$<var>y=3^{-2}=> y=(\frac{1}{3})^2 => y=\frac{1}{9}</var>$

 

Um abraço ai.

Answer 2

a)

 

$\text{y}^{\text{x}}=3^2=3\times3=9$

 

b)

 

$\text{y}^{\text{x}}=3^{-1}=\dfrac{1}{3^1}=\dfrac{1}{3}$

 

c)

 

$\text{y}^{\text{x}}=3^{0}=1$

 

d)

 

$\text{y}^{\text{x}}=3^{-2}=\dfrac{1}{3^2}=\dfrac{1}{9}$