Review question

# Given this log equation, when can $a$ be largest? Add to your resource collection Remove from your resource collection Add notes to this resource View your notes for this resource

Ref: R7015

## Question

Given that $a$ and $b$ are positive and $4(\log_{10}a)^2+(\log_{10}b)^2=1$ then the greatest possible value of $a$ is

1. $\frac{1}{10}$,

2. $1$,

3. $\sqrt{10}$,

4. $10^{\sqrt{2}}$.