4D History - 4D Statistic

power 4dTwo lenses have power of (i) + 2 d (ii) -4D. What is the nature and focal length of each lens? b. An object is kept at a distance of 100 cm from lens of power -4D. Calculate the image distance.Check 4D, 5D, 6D, Jackpot results, Sports Toto (Star, Power, Supreme Jackpot), Magnum Jackpot, Damacai 1+3D Jackpot, Live from Malaysia.