If f(x)=3/x+2- sqrt x-3 f(7)=?

Question

asked Sep 2, 2019 159k views

2 Answers

Lorenzo Morelli · Answer 1 · 2019-09-02T19:25:46+0000

To get the answer, you need to solve the equation for x = 7.

f(7) = 3/7 + 2 - sqrt(7) - 3.

= 3/7 - 1 - sqrt(7).

If you need to simplify it further:

= -4/7 - sqrt(7).

If you need it in decimal form: = -3.2171798824

Alxrb · Answer 2 · 2019-09-07T06:05:48+0000

Answer:

f(7)=-3.217

Explanation:

We are given that
$f(x)=(3)/(x)-\sqrtx-3$

We have to find the value of f(7).

Substitute the value of x=7

Then, we get

$f(7)=(3)/(7)+2-\sqrt7-3=(3)/(7)-1-\sqrt7$

$f(7)=(3-7)/(7)-\sqrt7=-(4)/(3)-\sqrt7$

f(7)=-(4)/(7)-2.646

Because
$\sqrt7=2.646$

f(7)=-(4+18.522)/(7)=-(22.522)/(7)

Hence, f(7)=-3.217