Further Mathematics Questions and Answers

$\frac{v}{p} = \frac{p}{p} log _x(M + N)$

$\log_x(M + N) = \frac{v}{p}$

$x^{\frac{v}{p}} = M + N$

N = X$^{\frac{v}{p}}$ - M 

2x + 3y = 10 .......x2

3x - 2y = -11 ........x3

4x + 6y = 20 

9x - 6y = -33

$\overline{\frac{13x}{13} = \frac{-13}{13}}$, x = 1

from 

2x + 3y = 10

2(-1) + 3y = 10

-2 + 3y = 10

3y = 10 + 2

$\frac{3y}{3} = \frac{12}{3}$, y = 4

x - y = -1 - 4

= -5

$\frac{d}{dx}(\frac{x }{x + 1}$) = $\frac{v\frac{du}{dx} - u\frac{dv}{dx}}{v^2}$ 

u = x, $\frac{du}{dx}$ = 1, v = x + 1, $\frac{dv}{dx}$ = 1

= $\frac{(x + 1)(1) - x (1)}{(x + 1)^2}$ 

= $\frac{x + 1 - x}{(x + 1)^2}$

= $\frac{1}{(x + 1)^2}$

$\frac{6x + k}{2x^2 + 7x - 15} = \frac{4}{x + 5} - \frac{2}{2x - 3}$

6x + k = 4 (2x - 3) - 2(x + 5)

6x + k = 8x - 12 - 2x - 10 

6x + k = 6x - 22 

k = - 22 

$\frac{(\sqrt{5} + 3)(4 + \sqrt{10})}{(4 - \sqrt{10})(4 + \sqrt{10})}$

= $\frac{4\sqrt{5} + \sqrt{50} + 12 + 3\sqrt{10}}{4^2 - (\sqrt{10})^2}$

= $\frac{4\sqrt{5} + 5\sqrt{2} + 12 + 3\sqrt{10}}{16 - 10}$

= $\frac{4 \sqrt{5}}{6} + \frac{5 \sqrt{2}}{6} + \frac{12}{6} + \frac{3\sqrt{10}}{6}$

= $\frac{2}{3}$$\sqrt{5}$ + $\frac{5}{6}\sqrt{2}$ + $\frac{1}{2}\sqrt{10}$ + 2