Question

Given f(x) =2x-x2, find(I) f(1) (ii) f(-1)
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Answer 1

Step-by-step explanation:

f(1)=2(1)-(1)²=2-1=1

f(-1)=2(-1)-(-1)²=-2-1=-3 OK friend this is urs answer OK

Answer 2

Given:
f(x) =2x-$x^{2}$

To find:

f(1) and f(-1)

Solution:

The required values of f(1) and f(-1) are 1 and -3.

We have to substitute the given values, 1 and -1, in the function given to obtain their values.

So, f(1) and f(-1) can be calculated by putting 1 and -1 in f(x) =2x-$x^{2}$.

We will calculate the values as follows-

f(1)=2(1)-$1^{2}$

=2-1

=1

Similarly, f(-1)=2(-1)-$(-1)^{2}$

= -2-1

= -3

So, f(1)=1 and f(-1)= -3.

Therefore, the required values of f(1) and f(-1) are 1 and -3.