Mathematics: If p(q-r)x^2 +q(r-p)x + r(p-q) has equal roots,then, 2/q=? ? a)p+ 1/r c)p+r b) 1/p +r d) 1/p + 1/r

If p(q-r)x^2 +q(r-p)x + r(p-q) has equal roots,then,

Ответ:

baue4431

02.06.2020

The answer is d) 1/p + 1/r.
Solution to this is,
[r(p-q)/p(q-r)]=1
pr-qr=pq-pr
2pr=pq+qr
2pr/pqr=(pq+qr)/pqr
2/q=1/r+1/p

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Ответ:

mariateamop

13.04.2020

Mathematics

The answer is B x^3

Step-by-step explanation: I just took the FLVS exam and this was the correct answer

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If p(q-r)x^2 +q(r-p)x + r(p-q) has equal roots,then, 2/q=? ? a)p+ 1/r c)p+r b) 1/p +r d) 1/p + 1/r

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