x: x2 - 81 = 0
27 x 3 = 81
x2 = 81 Square root both sides:- x = +/- 9
The number is three.
It is: (81*9*64)+19 = 46,675
log3(x)=4 x=3^4 x=81
log37 - log3x = 4 log3(7/x) = 4 7/x = 34 = 81 x = 7/81
No it is not. The log of any number, with the same number as the base, is always 1.
81% = 81/100
81 x 81 = 6561
How about: 9 times 9 = 81 or 81 times 1 = 81
81 * 22 = 1,782
100x2-81
729/81 = 9
3 to the power of 4 = 81
It is: 9^2 = 81
81 times 7 or 7 times 81 equals 567