Given that (√3)^7 + (√3)^5 + (√3)^3 + 42(√3) may be expressed as 3^κ,(adsbygoogle = window.adsbygoogle || []).push({});

find the value of κ

Now I know that (√3)^ 7 is the same as 3^3.5 so I have 3.5, 2.5 and 1.5 but i have no idea how to calculate 42 (√3). Please help :(

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with indices please!

**Physics Forums | Science Articles, Homework Help, Discussion**