2 lo g 7 0 9 8 0 0 × 5 lo g 7 0 1 4 0 × 7 lo g 7 0 2 = ?
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@Ayush Mishra , I redo the phrasing and LaTex of the problem for you.
N = 2 lo g 7 0 9 8 0 0 × 5 lo g 7 0 1 4 0 × 7 lo g 7 0 2 = 2 lo g 7 0 7 0 2 × 2 × 5 lo g 7 0 7 0 × 2 × 7 lo g 7 0 2 =
= 2 2 + lo g 7 0 2 × 5 1 + lo g 7 0 2 × 7 lo g 7 0 2 = 2 2 × 5 × 2 lo g 7 0 2 × 5 lo g 7 0 2 × 7 lo g 7 0 2 =
= 2 0 × ( 2 × 5 × 7 ) lo g 7 0 2 = 2 0 × 7 0 lo g 7 0 2 = 2 0 × 2 = 4 0
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N = 2 lo g 7 0 9 8 0 0 × 5 lo g 7 0 1 4 0 × 7 lo g 7 0 2 = 2 lo g 7 0 7 0 2 × 2 × 5 lo g 7 0 7 0 × 2 × 7 lo g 7 0 2 = 2 2 + lo g 7 0 2 × 5 1 + lo g 7 0 2 × 7 lo g 7 0 2 = 4 × 2 lo g 7 0 2 × 5 × 5 lo g 7 0 2 × 7 lo g 7 0 2 = 4 × 5 × ( 2 × 5 × 7 ) lo g 7 0 2 = 2 0 × 7 0 lo g 7 0 2 = 2 0 × 2 = 4 0