# Pre Cal (logs)

posted by
**Deb**
.

I need help with these logs

1: Log underscore4 16X

2: 2 Ln ( X(sqr. root)e

3:5^[2logUnderscore5(3x)]

4:log underscore2 ^[1280-logunderscore2 5)

I don't understand how to do them thanks