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power 4dAnswer:the power of a convex lens is always positive. as you can see here the power is +4D, therefore the nature of the lens is that it is a convex lens. we know, P = 1f. alsoPresentation on theme: The 4 Discips of Execution (4DX)— Presentation transcript: 1 The 4 Discips of Execution (4DX) Discip 1: Focus on your Wildly Important Goals (Ws) Set only 1 or 2 measurable, achievable goals