Mister Exam
Other calculators
-
How to use it?
- Equation:
-
Equation -x^2+6*x-7=0
-
Equation -x^3+4*x^2+4*x-16=0
-
Equation x/7=6
-
Equation x^2-15*x+54=0
- Express {x} in terms of y where:
- 10*x+12*y=-12
- 13*x+11*y=10
- 17*x-7*y=-15
- 3*x+5*y=-1
- Graphing y =:
- lg(x)
- Integral of d{x}:
-
lg(x)
-
-2
- Derivative of:
-
lg(x)
-
-2
- Sum of series:
-
-2
-
Identical expressions
- lg(x)=- two
- lg(x) equally minus 2
- lg(x) equally minus two
- lgx=-2
-
Similar expressions
- 3^(lgx)=1458-x^(lg3)
- lgx=-9,75
- lg(x)=+2
- 1.5*8.5-3.5*lg(x^2+15^2)^(1/2)+3
lg(x)=-2 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the equation
$$\log{\left(x \right)} = -2$$
$$\log{\left(x \right)} = -2$$
This equation is of the form:
By definition log
then
$$x = e^{- \frac{2}{1}}$$
simplify
$$x = e^{-2}$$
$$\log{\left(x \right)} = -2$$
$$\log{\left(x \right)} = -2$$
This equation is of the form:
log(v)=p
By definition log
v=e^p
then
$$x = e^{- \frac{2}{1}}$$
simplify
$$x = e^{-2}$$
Sum and product of roots
[src]
sum
-2 e
$$e^{-2}$$
=
-2 e
$$e^{-2}$$
product
-2 e
$$e^{-2}$$
=
-2 e
$$e^{-2}$$
exp(-2)