Question

(R1R2+R3R1+R2R3)/R1R2R3=?​
please answer.... important please

Answer 1

Answer:

so answer is 2

Step-by-step explanation:

Dear student

r1r2 +r2r3+ r3r1 =??

Δ/(s-a) * Δ/(s-b) + Δ/(s-b) * (s-c) + Δ/(s-c)*(s-a)

Δ2 ( 1/(s-a)(s-b) + 1/(s-b)(s-c) + 1/(s-c)(s-a) )

Δ2 ( 3s- (a+b+c)/(s-a)(s-b)(s-c))

Put value of s = (a+b+c)/2

So it will be equal to s2