Mathematics
8 Online
OpenStudy (anonymous):
hello
could you help me on this exponents question
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
it is given that
\[2^{2x-1}= 3^{1-x} \]
find the value of
\[12^{x}\]
OpenStudy (anonymous):
hende find the value of x
OpenStudy (anonymous):
hence*
OpenStudy (gorv):
\[2^{2x-1}=2^{2x}*2^{-1}\]
OpenStudy (gorv):
\[=\frac{ 2^{2x} }{ 2 }\]
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yes but i still can't get it
OpenStudy (gorv):
\[\frac{ (2^{2})^{x} }{ 2 }\]
OpenStudy (gorv):
u got what i m doing ???
OpenStudy (anonymous):
yes
OpenStudy (gorv):
12^x= (3*4)^x
(3*2^2)^x
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gorv):
\[=3^{x}*2^{2x}\]
OpenStudy (gorv):
it is 12^x we broke it into 2 and 3
OpenStudy (anonymous):
yes
OpenStudy (gorv):
upto here u got me right ??
OpenStudy (anonymous):
yes
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gorv):
on left side we got
\[\frac{ (2^{2})^{x} }{ 2 }\]
OpenStudy (gorv):
now on right side
OpenStudy (gorv):
\[3^{1-x}=3*3^{-x}\]
OpenStudy (gorv):
\[\frac{ (2^2)^{x} }{ 2 }=3*3^{-x}\]
OpenStudy (anonymous):
yes i understand until there
now multiply both sides by 3^x ?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gorv):
yeah
OpenStudy (gorv):
and thn also multiply by 2 on both side
OpenStudy (anonymous):
i got it
12^x = 6
OpenStudy (gorv):
to eliminate 2
OpenStudy (anonymous):
you are the best
thank you so much
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gorv):
yeah u got it ...very good :)
OpenStudy (gorv):
loll i m not the best..n welcme btw :)