turkey-yks 2017 Q10

turkey-yks · Other · lys1-math Indices and Surds Solving Equations Involving Surds
$\frac { 1 } { \sqrt { \mathrm{a} } } - \frac { 2 } { \sqrt { 9 \mathrm{a} } } = 1$\ Given this, what is a?\ A) $\frac { 1 } { 3 }$\ B) $\frac { 2 } { 3 }$\ C) $\frac { 1 } { 4 }$\ D) $\frac { 1 } { 9 }$\ E) $\frac { 4 } { 9 }$
$\frac { 1 } { \sqrt { \mathrm{a} } } - \frac { 2 } { \sqrt { 9 \mathrm{a} } } = 1$\
Given this, what is a?\
A) $\frac { 1 } { 3 }$\
B) $\frac { 2 } { 3 }$\
C) $\frac { 1 } { 4 }$\
D) $\frac { 1 } { 9 }$\
E) $\frac { 4 } { 9 }$