(adsbygoogle = window.adsbygoogle || []).push({}); Plz plz plz do reply(VECTORS related problem)

Hi.,

Well can u help me inthis problem.Bcoz after one day i am having a Physics test so plz do reply .

Q: prove the following

1) d/du(A+B)=d/du(A) +d/du(B)

2) d/du(cA)=d/du c(A) +c d/du(A)

3) d/du(A.B)=d/du(A).B +A. d/du(B)

Q: prove the vector identity

A x (B x C)=B(A.C)-C(A.B)

**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: Plz do reply(VECTORS related problem)

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