$\text { Consider the function } f ( x ) = \frac { 20 } { \sqrt { x } } \text {, and its second-degree polynomial }$
$P _ { 2 } ( x ) = 20 - 10 ( x - 1 ) + \frac { 15 } { 2 } ( x - 1 ) ^ { 2 }$ at $x = 0.8$. Compute the value of $f ( 0.8 )$ and $P _ { 2 } ( 0.8 )$. Round your answer to four decimal places.
A) $f ( 0.8 ) \approx 22.3607 , P _ { 2 } ( 0.8 ) \approx 44.6000$
B) $f ( 0.8 ) \approx 22.3607 , P _ { 2 } ( 0.8 ) \approx 22.3000$
C) $f ( 0.8 ) \approx 45.7214 ; P _ { 2 } ( 0.8 ) \approx 45.6000$
D) $f ( 0.8 ) \approx 21.3607 , P _ { 2 } ( 0.8 ) \approx 21.3000$
E) $f ( 0.8 ) \approx 23.3607 , P _ { 2 } ( 0.8 ) \approx 22.3000$

Question

$\text { Consider the function } f ( x ) = \frac { 20 } { \sqrt { x } } \text {, and its second-degree polynomial }$ 
$P _ { 2 } ( x ) = 20 - 10 ( x - 1 ) + \frac { 15 } { 2 } ( x - 1 ) ^ { 2 }$ at $x = 0.8$. Compute the value of $f ( 0.8 )$ and $P _ { 2 } ( 0.8 )$. Round your answer to four decimal places.
A) $f ( 0.8 ) \approx 22.3607 , P _ { 2 } ( 0.8 ) \approx 44.6000$
B) $f ( 0.8 ) \approx 22.3607 , P _ { 2 } ( 0.8 ) \approx 22.3000$
C) $f ( 0.8 ) \approx 45.7214 ; P _ { 2 } ( 0.8 ) \approx 45.6000$
D) $f ( 0.8 ) \approx 21.3607 , P _ { 2 } ( 0.8 ) \approx 21.3000$
E) $f ( 0.8 ) \approx 23.3607 , P _ { 2 } ( 0.8 ) \approx 22.3000$

Quizplus · Accepted Answer

$f(0.8) = \frac{20}{\sqrt{0.8}} \approx 22.3607$. $P_2(0.8) = 20 - 10(0.8 - 1) + \frac{15}{2}(0.8 - 1)^2 \approx 22.3000$.

Consider the function f(x)=20x, and its second-degree polynomial \text { Consider the function } f ( x ) = \frac { 20 } { \sqrt { x } } \text {, and its second-degree polynomial } Consider the function f(x)=x​20​, and its second-degree polynomial

$\text { Consider the function } f ( x ) = \frac { 20 } { \sqrt { x } } \text {, and its second-degree polynomial }$