\( \frac { \sqrt[ 3 ] { ( ( x _ { 0 } + \Delta x ) - 1 ) ^ { 2 } + \sqrt[ 3 ] { ( x _ { 0 } - 1 ) ^ { 2 } } } } { \Delta x \cdot ( \sqrt[ 3 ] { x _ { 0 } - 1 } + \sqrt[ 3 ] { x _ { 0 } - 1 } ) } \)

A particle \( P \) moves in a straight line so that, \( t \) seconds after passing a fixed point \( O \), its displacement, \( s \) metres, is given by \( s=4 t^{3}-15 t^{2}+18 t \). Find (i) the velocity of \( P \) when \( t=3 \), (ii) the acceleration of \( P \) when \( t=3 \), (iii) the values of \( t \) when \( P \) is at instantaneous rest, (iv) the distance travelled by \( P \) in the first 2 seconds of its motion, (v) the distance of \( P \) from \( O \) when \( t=2 \).

v) \( \int \frac{x^{3} d x}{\left(x^{2}-a^{2}\right)^{3 / 2}} \)

1. \( y=\left(x^{2}+2 x\right)^{x^{2}-2 x} \) ise \( \frac{d y}{d x}= \) ?

18) \( \sum_{k=1}^{4} \frac{2 k-1}{k} \)

Given \( \mathrm{TP}=90 \mathrm{~K}^{2}-\mathrm{K}^{3} \) find a. Marginal product b. Average product c. The value of output which equates average product and marginal product