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20 10 Pudong New Area Senior Three Science Mathematics Volume II Question 23
It used to be the same as the first floor

But the solution is 2 x = 1 or 1/2.

X=0 or-1

And one of the answers he added was wrong.

Logarithmic function is not, derivative function is inverse function.

Logarithmic function and exponential function are reciprocal functions!