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CBSE Class 11-commerce Answered

Please solve
question image
Asked by deepakagarwal1024 | 24 Dec, 2018, 08:31: PM
answered-by-expert Expert Answer
a, b and c are in G.P.
b2 = ac 
b = √ac
ax2 + bx + c = 0
ax2 + √acx + c = 0
begin mathsize 16px style open parentheses square root of straight a straight x plus square root of straight c close parentheses squared equals 0 square root of straight a straight x plus square root of straight c equals 0 straight x equals negative square root of straight c over straight a end root space space space space space....... left parenthesis straight i right parenthesis ax squared plus 2 bx plus straight c equals 0 space and space dx squared plus 2ex plus straight f equals 0 space space have space common space root from space left parenthesis straight i right parenthesis space ax squared plus 2 bx plus straight c equals 0 space has space equal space roots space both space equal space to space minus square root of straight c over straight a end root minus square root of straight c over straight a end root space is space straight a space root space of space the space equation space dx squared plus 2ex plus straight f equals 0 put space straight x space equals space minus square root of straight c over straight a end root and space solve space it space further space we space get 2 straight e over straight b equals straight d over straight a plus straight f over straight c straight d over straight a comma space straight e over straight f comma space straight f over straight c space are space in space straight A. space straight P. end style
Answered by Sneha shidid | 26 Dec, 2018, 10:33: AM

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