Question

usually d2z/dx2 denote by the letter (a) p (b) q (c) r (d) s​

Answer 1

SOLUTION

TO CHOOSE THE CORRECT OPTION

$\displaystyle \sf{Usually \: \: \frac{ { \partial}^{2} z}{ \partial {x}^{2} } \: \: denote \: by \: the \: letter }$

(a) p

(b) q

(c) r

(d) s

EVALUATION

In study of partial differential equation

The usual notations are

$\displaystyle \sf{p = \: \frac{ { \partial} z}{ \partial {x}} \: }$

$\displaystyle \sf{q = \: \frac{ { \partial} z}{ \partial y} \: }$

$\displaystyle \sf{r = \: \frac{ { \partial}^{2} z}{ \partial {x}^{2} } \: }$

$\displaystyle \sf{s = \: \frac{ { \partial}^{2} z}{ \partial x \partial y} \: }$

$\displaystyle \sf{t = \: \frac{ { \partial}^{2} z}{ \partial {y}^{2} } \: }$

FINAL ANSWER

Hence the correct option is (c) r

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