Calculus Answers

if x+y+z=81 then find the least value of 1/x3 +1/y3 +1/z3

Graph

In(x-3) + 4

and In(x + 3)

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Please help me this question
Use Parseval's theorem to find the value of the sum
1+1/(3^(2))+1/(5^(2))+1/(7^(2))+....

Q. Define Line Integrals and write the applications of line integrals.

Q. State and prove Divergence theorem.

Q. Write down the geometrical meaning of partial derivatives.

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State the domain and range of the function. Show work.
: k(x) = 4x + 3
---------
x^2 - 1