Question

Plz solve 17th and 18th one

Answer 1

Answer:

-c/d

Step-by-step explanation:

alpha + beta + gamma= -coefficient of x²/coefficient of x³

= -b/a

alpha.beta + beta.gamma + alpha.gamma = coefficient of x/coefficient of x³

= c/a ...........1

alpha ×beta ×gamma= -constant term/coefficient of x³

= -d/a ............2

So, 1/alpha + 1/beta + 1/gamma = eq.1 / eq.2

= (c/a) / (-d/a) = -c/d