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How do you solve #log_b9=2# and check the solutions?

1 Answer

Jan 5, 2017

#b=3#.

Explanation:

Recall the Defn. of log. function :

# log_b y=x iff b^x=y, b gt 0, b ne1, y gt 0#

Hence, #log_b 9=2 rArr b^2=9 rArr b=+-3#

Since, #b gt 0, b=+3# is the Soln.

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