Page 2 RECHARGEABLE 24GHz DX2 STUNT DRONE INTRODUCTION SPECIFICATIONS Congratulations on your purchase of the Drone Battery 350 mAh Lipo Rechargeable 24 GHz DX2 Stunt Drone Remote Controller Battery 6 x 15V AA Get ready to soar to new heights. Answer (1 of 7) \dfrac{d^2y}{dx^2} is the second derivative that is that \dfrac{d^2y}{dx^2} is the derivative of \dfrac{dy}{dx} (These 2s may look like index notation, but they aren’t) (\frac{dy}{dx})^2 on the other hand is the square of the first. The DX2 incorporates all the key ingredients that made the DX1 HCP and DX1SE packages so successful, reengineered with an improved cabinet design and a smart, contemporary new look The drive units have been finetuned and the active subwoofer upgraded with a more powerful and sophisticated integral amplifier, resulting in greater scale, punch and refinement.