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CBSE Class 9 Answered

find x in the following- 6^2x-1 - 36^x-1 = 6480  
Asked by Kanhaiya | 09 Sep, 2015, 06:48: PM
answered-by-expert Expert Answer

hi

6 to the power of 2 x minus 1 end exponent minus 36 to the power of x minus 1 end exponent equals 6480 6 to the power of 2 x end exponent 6 to the power of negative 1 end exponent minus 6 to the power of 2 x end exponent 6 to the power of negative 2 end exponent equals 6480 6 to the power of 2 x end exponent open parentheses 6 to the power of negative 1 end exponent minus 6 to the power of negative 2 end exponent close parentheses equals 6480 6 to the power of 2 x end exponent open parentheses 5 over 36 close parentheses equals 6480 6 to the power of 2 x end exponent equals 1296 cross times 36 6 to the power of 2 x end exponent equals 6 to the power of 6 S o space x space equals space 3

Answered by | 09 Sep, 2015, 06:57: PM

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