Question

If x = (
${ \\5}^{?}$
$\frac{5}{7}$
$\frac{5}{7} - 5 \times \frac{7}{5}$
) x (<»? then find the value of 2x + 1​

Answer 1

Answer:

E=≈3.098076211

Step-by-step explanation:

If x=2+√3, then find the value of √(2x)+1/√(2x)?

E=2x−−√+12x√=2x√1+12x√  

Now, let’s put both parts of the expression over the same denominator.

E=2x−−√2x√2x√+12x√=2x2x√+12x√=2x+12x√  

We’ll now replace  x  by  2+3–√  

E=5+23√4+23√√  

Now, to replace the nasty denominator with something much nicer; we’ll do this by multiplying the denominator and numerator by  4−23–√−−−−−−−√ .

E=5+23√4+23√√×4−23√√4−23√√=(5+23√)4+23√√×4+23√√4−23√√  

=(5+23√)(4+23√√)(4+23√√)(4−23√√)=(5+23√)(4−23√√)16−12√  

=(5+23√)(4−23√√)2=5+23√24−23–√−−−−−−−√  

=5+23√2(3–√−1)=1+33√2  

Evaluating this, we have:

E=≈3.098076211  

Answer 2

this right answer really