Which of these formulae is correct to find the gradient of the element ‘k’?

Question

McqOptions · Accepted Answer

McqOptions · Answer

∇Φk = $\frac{1}{V_k}(\Sigma_{n\leftarrow fk} \Phi_n\vec{S_n})$

McqOptions · Answer

∇Φk = $\frac{1}{V_k}(-\Sigma_{n\leftarrow f}\Phi_n \vec{S_n})$

McqOptions · Answer

∇Φk = $\frac{1}{V_k}(\Sigma_{n\leftarrow f}\Phi_n \vec{S_n})$

McqOptions · Answer

∇Φk = $\frac{1}{V_k}(- \Sigma_{n\leftarrow fk} \Phi_n\vec{S_n})$

1.	Which of these formulae is correct to find the gradient of the element ‘k’?
A.	∇Φk = \(\frac{1}{V_k}(\Sigma_{n\leftarrow f<k}\Phi_n\vec{S_n}-\Sigma_{n\leftarrow f>k} \Phi_n\vec{S_n})\)
B.	∇Φk = \(\frac{1}{V_k}(-\Sigma_{n\leftarrow f}\Phi_n \vec{S_n})\)
C.	∇Φk = \(\frac{1}{V_k}(\Sigma_{n\leftarrow f}\Phi_n \vec{S_n})\)
D.	∇Φk = \(\frac{1}{V_k}(- \Sigma_{n\leftarrow f<k}\Phi_n\vec{S_n}+\Sigma_{n\leftarrow f>k} \Phi_n\vec{S_n})\)
Answer» E.

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