Question

( t_{1}, quad t_{n}+1, quad t_{2} n+1 )
are in
( 2 operatorname{tn} t 1=t 4+t_{2} n+1 )
( 2 cdot log _{10}^{b}=log _{10}^{a}+log _{10} c )
( log _{10} b^{2}=log _{10}^{a c} )
( Rightarrow quad b^{2}=a c )
( a_{1} b, c ) are
in GP

# If in an AP, t = log,, a, t+1 = log,, band t2n+1 = logo c then a, b, care in (A) AP (B) GP (C) HP (D) none of these

Solution