Mister Exam

log35(35x+2)<=1 inequation

A inequation with variable

The solution

You have entered [src]
log(35*x + 2)     
------------- <= 1
   log(35)        
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} \leq 1$$
log(35*x + 2)/log(35) <= 1
Detail solution
Given the inequality:
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} \leq 1$$
To solve this inequality, we must first solve the corresponding equation:
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} = 1$$
Solve:
Given the equation
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} = 1$$
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} = 1$$
Let's divide both parts of the equation by the multiplier of log =1/log(35)
$$\log{\left(35 x + 2 \right)} = \log{\left(35 \right)}$$
This equation is of the form:
log(v)=p

By definition log
v=e^p

then
$$35 x + 2 = e^{\frac{1}{\frac{1}{\log{\left(35 \right)}}}}$$
simplify
$$35 x + 2 = 35$$
$$35 x = 33$$
$$x = \frac{33}{35}$$
$$x_{1} = \frac{33}{35}$$
$$x_{1} = \frac{33}{35}$$
This roots
$$x_{1} = \frac{33}{35}$$
is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
$$x_{0} \leq x_{1}$$
For example, let's take the point
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$- \frac{1}{10} + \frac{33}{35}$$
=
$$\frac{59}{70}$$
substitute to the expression
$$\frac{\log{\left(35 x + 2 \right)}}{\log{\left(35 \right)}} \leq 1$$
$$\frac{\log{\left(2 + 35 \cdot \frac{59}{70} \right)}}{\log{\left(35 \right)}} \leq 1$$
log(63/2)     
--------- <= 1
 log(35)      

the solution of our inequality is:
$$x \leq \frac{33}{35}$$
 _____          
      \    
-------•-------
       x_1
Solving inequality on a graph
Rapid solution 2 [src]
        33 
(-2/35, --]
        35 
$$x\ in\ \left(- \frac{2}{35}, \frac{33}{35}\right]$$
x in Interval.Lopen(-2/35, 33/35)
Rapid solution [src]
   /     33           \
And|x <= --, -2/35 < x|
   \     35           /
$$x \leq \frac{33}{35} \wedge - \frac{2}{35} < x$$
(x <= 33/35)∧(-2/35 < x)