Archive
9th of September 2015
Mathematics
Q:

find x in the following-

6^2x-1 - 36^x-1 = 6480

Kanhaiya Varshney - CBSE - Class IX

Wednesday, September 09, 2015 at 18:48:PM

A:

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

Wednesday, September 09, 2015 at 18:57:PM