In a G.P. consisting of positive terms , each term equals the sum of the next two terms. Then the common ratio of this progression equals...

a) 1/2 (root 5) b) root 5 c) 1/2 (root 5 - 1) d) 1/2 (1- root 5 )

correct option is c root 5-1/2.........
SOLUTION.
LET THE TERM OF GP BE A ,AR, AR2,.........AR ^N-1
ACCORDING TO QUESTION
A=AR+AR2
A=A(R+R2)
1=R+R2
R2+R-1....SOLVE FOR R YOU WILL GET ROOT 5-1 USING D FORMULA
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6yh
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7 ka ans

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here is the answer for your question

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~'c' is the correct option...

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ar+ar*2=a r+r*2-1=0 r=root5-1÷2
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So this is the correct answer........
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