If $\log_a x, \log_b x, \log_c x$ are in $H.P.$,then $a, b, c$ are in

If $a, b, c$ are in $G$.$P$. $(a > 1, b > 1, c > 1)$, then for any real number $x$ $(x > 0, x \neq 1)$, the terms $\log_{a} x, \log_{b} x, \log_{c} x$ are in:

Given that the roots of $x^3+3px^2+3qx+r=0$ are in harmonic progression,then:

If $\ln(a + c)$,$\ln(c - a)$,and $\ln(a - 2b + c)$ are in $A.P.$,then

If $a, b, c$ are in $H.P.$,then which one of the following is true?

If $a, b, c$ are in $H.P.$,then $\frac{a}{b + c}, \frac{b}{c + a}, \frac{c}{a + b}$ are in