Question

If f(x)=x-5 then find the value of f(x) + f (-x)​

Answer 1

Answer:

If f(X) =x^2+4 x+5 then for what value of x, f(x) =f(x+1)?

Give Amazon a try.

f(x)= x^2 +4x+5.................. 1st equation

f(x+1)= (x+1)^2+4(x+1)+5

= x^2 +2x +1+4x+4+5

f(x+1) =X^2 +6x+10............. 2nd equation

Now, according to the requirement of the question,

Do 1st equation = 2nd equation.

So,

x^2 +4x +5=x^2 +6x +10

After simplifying this equation you will get the ans. that x=- 5/2.