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a1,a2.... be an AP a(p),a(q),a(r)

then show a(p) : a(q) = r-q/q-p

a1 means a base 1 similar for terms in brackets

if a1 a2 a3 a4........ an are in hp then

a1/a2+a3+...an , a2/a1+a3+.an,...an/a1+a2+....+an-1 are in

a1 meanns a base 1 similar for all cases

find min value of x^4+1/x^2

series

if 1-1/2+1/3-1/4+1/5.................=log2

then

1/1.2.3+1/5.6.7+1/9.10.11+.................................is

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THE MAX NO. OF H BONDS IN WHICH H20 CAN PARTICIPATE EXPLAIN

select orders of element with indicated order and why

NH3 ,BiH3,SbH3,AsH3,PH3 (BOILING POINT)

H2O,H2Te,H2Se,H2S(BOILING POINT)

NH3,PH3,AsH3,SbH3(BASIC CHARACTER)

H2O,H2S,H2Se,H2Te(ACIDIC "CHARACTER)

NH3 NF3 BF3 (DIPOLE MOMENT)

HCLO4 HBRO4 HIO4(PKA VALUES)