Eor each equation, determine whether it represents a direct variation, an inverse variation, or neither. Find the constant of variation when one exists and write it in simplest form. \( -3 x+\delta y=-1 \) Constant of variation: \( k=\square \) Dinverse variation Constant of variation: \( k=\square \)

(59.) \( a b-b^{2}, a^{2} b+b \) এর গসাগু কত?

will be cqual, if either \( b=0 \), or \( a^{3}+b^{2}+c^{3}-3 a b c-0 \). If \( a, b, c \) arc rational and \( a+b+c=0 \), show that the roots of \( (b+c-a) x^{2}+(c+a-b) x+ \) \( (a+b-c)=0 \) are rational.

\( \left. \begin{array} { l } { c ^ { 2 } - a b = 22 } \\ { b ^ { 2 } - a c = - 103 } \\ { a ^ { 2 } - b c = ? } \end{array} \right. \)

\( 4 x^{2}+k x+5=0 \) has roots whose difference is \( \frac{1}{4} \)

Which is equivalent to \( \frac{x^{3}}{\sqrt{x}} \) ? A. \( x^{3 / 2} \) B. \( x^{2} \) C. \( x^{5 / 2} \) D. \( x^{7 / 2} \) E. \( x^{6} \)