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If x ,y ,z are in A.P. and A1 is the A.M...

If `x ,y ,z` are in A.P. and `A_1` is the A.M. of `xa n dya n dA_2` is the A.M. of `ya n dz` , then prove that the A.M. of `A_1a n dA_2i sy` .

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
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  20. Find the first four terms of the sequence defined by a1=3\ a n d\ an=3...

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