evaluate the function at the given values of x, if possible
f(x)=2x^2-1/x2
(a)x=5 (b)x=-3

Question

evaluate the function at the given values of x, if possible
f(x)=2x^2-1/x2   
(a)x=5   (b)x=-3

anonymous · Answer

kianap just replc the value instead of x ... I'm sure u will get the answer : )

anonymous · Answer

if u still have problem then pls tell me ..

and is the denominator x^2 or just x2

anonymous · Answer

this problems is more difficult than the last one.

anonymous · Answer

ok ,  f(x) = 2x^2 - 1 
                --------   right?
                    x^2

anonymous · Answer

is denominator 

$$2x$$$$x ^{2}$$
?

anonymous · Answer

the second one, sorry

anonymous · Answer

ok : )

jhonyy9 · Answer

for x=5 f(5)=50-1/25
for x=3 f(3)=18-1/9

anonymous · Answer

Now , 


f(x) = 2x^2 - 1 
         --------
         x^2

our first value is 5

5^2 =25
so  f(5) = 2*25 -1 /25
     f(5) = 49/25

anonymous · Answer

for f(-3)  =   2 *-3*-3  - 1 
                 --------------
                     -3*-3

f(-3)=   17/9

anonymous · Answer

thank u... i am writting this example down but, i still really do not understand the square root... I will get it.