2x=52^x = 52x=5
52=x5^2 = x52=x
25=x2^5 = x25=x
x5=2x^5 = 2x5=2
logb(xy)=logb(x)⋅logb(y)\log_b(xy) = \log_b(x) \cdot \log_b(y)logb(xy)=logb(x)⋅logb(y)
logb(xy)=logb(x)−logb(y)\log_b(xy) = \log_b(x) - \log_b(y)logb(xy)=logb(x)−logb(y)
logb(xy)=logb(x)+logb(y)\log_b(xy) = \log_b(x) + \log_b(y)logb(xy)=logb(x)+logb(y)
False
True
x=5x = 5x=5
x=11x = 11x=11
x=24x = 24x=24
x=8x = 8x=8
Logarithmic functions often generate complex numbers that must be ignored.
Logarithms can only evaluate even numbers.
Converting to exponential form always introduces rounding errors.
Logarithms can only evaluate strictly positive arguments, so some algebraic solutions may be extraneous.
x=1x = 1x=1 and x=8x = 8x=8
x=9x = 9x=9 only
x=9x = 9x=9 and x=−1x = -1x=−1
x=−1x = -1x=−1 only
loga(x4)\log_a(x^4)loga(x4)
loga4(x)\log_{a^4}(x)loga4(x)
loga(4x)\log_a(4x)loga(4x)
x=1x = 1x=1
x=10x = 10x=10
x=0x = 0x=0
x=ex = ex=e
The distributive property
The change of base formula
The one-to-one property (M=NM = NM=N)
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