If a, b, c are in HP, then `(a-b)/(b-c)` is equal to
A. `a/b`
B. `a/c`
C. `a/d`
D. `b/d`

If a,b,c,d are in H.P., then :

If a, b, c and d are in GP, then (a+b+c+d)^(2) is equal to

If a, b, c, d are in G.P., then (a + b + c + d)^(2) is equal to

If a/b = c/d , then ( ( a +c )/( b + d ) ) is equal to

If a ,b ,c ,d are in G.P, then (b-c)^2+(c-a)^2+(d-b)^2 is equal to (a-d)^2 b. (a d)^2 c. (a+d)^2 d. (a//d)^2

If a,b,c are in AP and b,c,d be in HP, then

If a,b,c are in AP and b,c,d be in HP, then

If a,b,c are in AP and b,c,d be in HP, then

If a+1=b+2=c+3=d+4=a+b+c+d+5, then (a+b+c+d) is equal to