The value of abc(a2+b2) for a=1, b=1 and c=2 is:
1
2
4
8
abc(a2+b2)
= 1×1×2(12+12)
= 2(2)
= 4
Suppose a, b, c are in A.P. and a2, b2, c2 are in G.P.. If a<b<c and a+ b+ c =32 , then value of a is