Algebra
# Logarithmic Functions

$\large \log_7 35 + \log_7 35 - \log_7 25 = \ ?$

If $4 \log_{12} \left(x^9\right) + \log_{12} \left(x^6\right) = 126$, find $x.$

Find the smallest number among the following numbers:

(A) $\log_{2015}2016$

(B) $\log_{2016}2017$

(C) $\log_{2017}2018$

(D) $\log_{2018}2019$

(E) $\log_{2019}2020$