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# CBSE Class 11-science Answered

7th sum
Asked by lovemaan5500 | 19 Jun, 2018, 12:06: PM
Expert Answer
`as this is in AP 2q=p+r----eq(1)as in GP q=p.c & r=p*c2 where  c=common ratio,putting in eq(1) 2*p.c=p+p*c2 hence c2+1-2c=0  ( c-1)2=0 so c=1frm(1) p-q=q-r or (p-q)/(q-r)=1=c `
Answered by Arun | 20 Jun, 2018, 10:57: AM

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