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If `a ,b ,c`are first three terms of a G.P. If the harmonic mean of `aa n db`is 20 and arithmetic mean of `b & c`is 5, thenno term of this G.P.is square of an integerarithmetic mean of `a ,b ,c`is 5c. `b=+-6`d. common ratio of this G.P. is 2A. no term of this G.P. is square of an integerB. arithmetic mean of `a,b,c,` is `5`C. `b = +- 6`D. common ratio of this G.P. is 2

Answer» Correct Answer - A


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