Question

please answer question-10, 16, 17, 18​

Answer 1

Answer:

10.

putting x=0

we got d=0

we have

ax³+bx²+cx

take x common

x(ax²+bx+c)

product of other zeroes =c/a

16.)sum of roots=(-k)

product=k

case 1

k is negative

sun is positve and product is negative

means the roots have different signs

case 2

k is positive

sum is negative and product is positive

means both roots have same sign and are negative

answer is (a) they can't be both positive

17)let's the roots be p and p

product=p²=c/a

c/a is positive

hence c and a must have same signs

sum =2p=-b/a

answer is (c)

18)sum of roots=-b/a

sun of roots taken two at a time=4/a

option B

product=-7/a

next time ask questions seperately it's hard to solve this way