If there is no base in a logarithm what does it automatically equal?
10
what is the equation for logarithmic form?
Given: bx = a
logba=x
what is the first step when solving logarithmic equations? log x + log 5 = 3
Condensing the logarithm
logx16 = 4
x= 2
log x = log 5
x =5
In a logarithm subtraction goes with what?
Division
what is the formula for exponential form?
Given: logba=x
bx=a
If two logs have the same base then what can you do?
cross them out and solve like a regular math equations.
log5 + log2 = x
x= 1
log45x = log4 (2x + 9)
x = 3
In a logarithm adding goes with what?
Multiplication
convert into exponential form: log39=2
32=9
At the end when checking your answer what can NOT be in the logarithmic equation?
log ( ?) = 5
A negative
log33 = log3x - log33
x= 9
log23x + log23 = log263
x = 63
Where should you move the exponent to?
logkmw
the front: wlogkm
convert into logarithmic form:132=168
log13168=2
Solve: log9(6-3w)=log9(-2w)
No Solution
2x+1= 32
x= 4
log2(x+2) + log25 = log220
x = 2
If you Condense: 2log3X, where does the 2 move to?
on the exponent of 8.
convert into log form: 83= 6
log86=3
Solve: log5 + log20 = x
x= 2
9x-1= 81x
x= -1
log 4x - log 8 = log 31
x = 62
Evaluate.
64
Evaluate
UNDEFINED
A logarithm of a negative number does not exist in set of real numbers.
logc (x+2) = logc (x-1) + logc (x-2)
x=4
2x+4 + 8x =164
x = 4
logc (x+2) = logc (x-1) + logc (x-2)
x=4