pls do it correctly.....
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check you 2nd question please
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3^(x+2) - 3^x =72
3^x(3^2 - 1)=72
3^x(9-1)=72
3^x ×8=72
3^x=9
3^x=3^2
so, x=2
joyaparvine:
i think the 2nd answer is written incorrectly
plz check it
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