Question

answer this question its urgent​

Answer 1

Answer:

your answer is in attachment above

please mark me as brainliest

Answer 2

Answer:

5. -955

5. -9556. -9/2

Step-by-step explanation:

5.

l = -1000

d = -10 - -5 = -5

n = 10

An = l - (n-1) d

= -1000 - (10-1) x -5

= -1000 - 9 x -5

= -1000 + 45

= -955

6.

$\frac{1}{ \alpha } + \frac{1}{ \beta } = \frac{ \alpha + \beta }{ \alpha \beta } \: (by \: taking \: lcm)$

$WKT, \: \alpha + \beta = \frac{ - b}{a} \: and \: \alpha \beta = \frac{c}{a}$

a = 2 , b = -3 and c = -6

$\alpha + \beta = \frac{ 3}{2}$

$\alpha \beta = \frac{ - 6}{2} = - 3$

$\frac{1}{ \alpha } + \frac{1}{ \beta } = \frac{ \alpha + \beta }{ \alpha \beta } = \frac{ \frac{3}{2} }{ - 3}$

$= \frac{3}{2} \times - 3 = \frac{ - 9}{2}$