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Dear Sir/Ma'am pl tell question 28 both parts with explanation

Asked by neeraj.unnao 3rd October 2017, 11:47 PM
Answered by Expert
Answer:
begin mathsize 16px style al space plus space bm space plus space cn space equals space 0
cn space equals space minus space al space minus space bm
straight n space equals space fraction numerator space minus space al space minus space bm over denominator straight c end fraction
Put space it space in space the space equation
fmn space plus space gnl space plus space hlm space equals space 0
We space get
ag open parentheses straight l over straight m close parentheses squared space plus space open parentheses af space plus space bg space minus space ch close parentheses open parentheses straight l over straight m close parentheses space plus space bf space equals space 0
This space is space quadratic space equation. space
Solving space this space we space get space straight f over straight a plus straight f over straight b plus straight f over straight c equals 0
end style
Answered by Expert 4th October 2017, 11:06 AM
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