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iosangel:
solve for x 3^7x=81^x+9
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iosangel:
|dw:1636226306930:dw|
iosangel:
Can i use log to solve this
Nnesha:
yes
surjithayer:
any idea?
surjithayer:
no,need to take log. \[3^{7x}=81^{x+9}\] \[3^{7x}=(3^4)^{(x+9)}\] \[3^{7x}=3^{4(x+9)}\] \[3^{7x}=3^{(4x+36)}\] 7x=4x+36 x=?
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iosangel:
12
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