Chapter - indices, Class 9th
Find the value of X,
hoping for great answers :)
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Chapter - indices, Class 9th
Find the value of X,
hoping for great answers :)
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^ is the exponential in the equations below.
3^(3x) + 9 = 10*3^(x)
Dividing both sides by 3^(x)
3^(3x)/3^(x) + 3^(2)/3^(x) = 10
3^(2x) + 3^(2-x) = 10
Now, if we use Hit and Trial method,
Let x be 0, then
3^(2*0) + 3^(2-0) = 10
3^0 + 3^2 = 10
1 + 9 = 10
10 = 10
LHS = RHS
Therefore, the value of x will be 0
Hence Proved
P.S. This method is not appropriate for examination. It is used here for understanding purposes.