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logbase5 of x =z x=5^z
Aeff=(Zeff)/((Z/A)eff) Zeff=wi*Zi wi is weight fraction in ith element in compound. for example water has 0.112 H and 0.888 O. (Z/A)eff=wi*Zi/Ai
5x3y2z3
(x - y)2 - z2 is a difference of two squares (DOTS), those of (x-y) and z. So the factorisation is [(x - y) + z]*[(x - y) - z] = (x - y + z)*(x - y - z)
y varies jointly with x and z if: when x is held fixed, y varies with z and when z is held fixed, y varies with x. Bothe x and z may vary together.