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Collection and Organisation of Data

21. If sn den...

Question

21. If sn denoted the sum of first n term of an A.P prove than s30 =3 (s20 - s10)

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S_{n}

n

A P

S_{30} = 3 (S_{20} - S_{10})

S_{n}

A P

S_{30} = 3 (S_{20} - S_{10})

S_{n}

n

S_{10} = 530, S_{5} = 140,

S_{20} - S_{6}

S_{n}

n

G . P

(S_{10} - S_{20})^{2} = S_{10} (S_{30} - S_{20})

S_{n}

n

G . P

(S_{10} - S_{20})^{2} = S_{10} (S_{30} - S_{20})

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