Manipal MET2019MathematicsFunctions

If f(x)= [ ^2 ] x+ [- ^2 ] x , then

Options

Af ( 4 )=2
Bf(- )=2
Cf( )=1
Df ( 2 )=-1

Correct answer

D. f ( 2 )=-1

Step-by-step solution

We have, f(x)= [ ^2 ] x+ [- ^2 ] x (i) Put the value of =3.141 aligned & ^2= app. 9.6 in (i) & f(x)= 9 x+ 10 x [ =3.141] & Put x= 4 & f ( 4 )= 9 4 + 10 4 = 1 2 +0= 1 2 aligned Now, f(- )= 9 + 10 =-1+1=0 and f( )= 9 + 10 =0 aligned f ( 2 ) & = 9 2 + 10 2 & = 9 2 + 5 =0+(-1)=-1 aligned

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