Well, isn't that just a happy little math question! When you see "log base 81 of 9," you're looking for the power you need to raise 81 to get 9. Since 81 to the power of 1/2 equals 9, the answer is 1/2. Just a little mathematical magic to brighten your day!
It is 256.
3^(-2x + 2) = 81? log(3^(-2x + 2)) = log(81) (-2x+2)log(3) = log(81) -2x = log(81)/log(3) - 2 x = (-1/2)(log(81)/log(3)) + 1
9
9 x 9 = 81 because if you count 9 times it would make up or be 81
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
It is 256.
Log base 3 of 81 is equal to 4, because 3 ^ 4 = 81. Therefore, two times log base 3 of 81 is equal to 2 x 4 = 8.
Check
3^(-2x + 2) = 81? log(3^(-2x + 2)) = log(81) (-2x+2)log(3) = log(81) -2x = log(81)/log(3) - 2 x = (-1/2)(log(81)/log(3)) + 1
The above question rewritten as an equation:81/100=0.95d or to put all the numbers in similar terms:.81=.95dIn order to solve for d, remember the logarithm definition: logax=N means that aN=xTherefore,log.9(.81)=5dSince logs are base 10, you need to change to base .9, to solve the left side of the equation:log10(.81)/log10(.9)=2Therefore: 2=5d or d=2/5 or 0.4
No it is not. The log of any number, with the same number as the base, is always 1.
log37 - log3x = 4 log3(7/x) = 4 7/x = 34 = 81 x = 7/81
If a right triangle has an area of 81 meters an a base of 9 meters its height is: 18 meters.
log9(x)=2 x=9^2 x=81
Area = (1/2) x base x height , so solve this for height; height = 2 x Area / base height = (2)(81)/(9) = 18
9(9) = 81 base 10. In base 4 it is 1101 (64 + 16 + 1), etc.
81 9*9=8181