Question

solve and check.
2log (x-1) = 2 + log 100
please help, i don't know what to do first... ?

Answer 1

first, you put log 100 on the left side

Answer 2

mhm.. then?

Answer 3

what did you get?

Answer 4

2log(x-1) - log100=2
right?

Answer 5

right. simplify it

Answer 6

okay.. uhmm.. so this is really new to me.. what do i do with the 2 in front of the log ?? :S

Answer 7

here are the rules you might want to learn

POWER RULE:
\[\huge \log_a b^c \implies c\log_a b\]
PRODUCT RULE
\[\huge \log_a (bc) \implies \log_a b + \log_a c\]
QUOTIENT RULE:
\[\huge \log_a (\frac bc) \implies \log_a b - \log_a c\]
does that help?

Answer 8

yes , thank you... my unit notes did not give me those rules.. /:

Answer 9

no wonder. so now...simplify