Question

The value of $x$ satisfying the logarithm ${\log }_{243}x=0.8$ is equal to

• A. $81$
• B. $1.8$
• C. $2.43$
• D. $27$

Answer 1

The correct option is A $81$

Given, ${\log }_{243}x=0.8$

$\Rightarrow {243}^{0.8}=x$
$\Rightarrow (3^5{)}^{4/5}=x$

$\Rightarrow 3^4=x$
$\Rightarrow x=81$