Index
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If
prove that a, b, c are in G.P. or a is a root of ax2 + 2bx + c = 0.
Matching exercise
Match the items on the right to the items on the left.
Check
OK
Step - 1
Step - 2
Step - 3
prove that a, b, c are in G.P. or a is a root of ax2 + 2bx + c = 0. 
