Discussion :: Logarithm
- If log10 = 2, find the value of x.
Answer : Option A
Explanation :
We have log10 = 2
Or, we can write it as log10 = 2 log10 10
Or, log10 = 2 log10 100
Therefore, both side log will be canceled out.
Or, = 4
We know that √x = a, or x1/2 = a, then x = a2
Similarly, x2 - 12x + 36 = 42
Or, x2 - 12x + 36 = 16
Or, x2 - 12x + 20=0
Now, (x-2)(x-10) = 0
Or, x-2 = 0, and x-10 =0
Therefore, we can say that x = 2, x = 10
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