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12 July, 18:40

Calculati : d. (3/1x4 + 3/4x7 + 3/7x10 + ... + 3/97x100) + (1/20x21 + 1 / 21x22 + ... + 1/79x80) =

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  1. 12 July, 18:47
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    Hi there!

    So, first you have to do all the multiplication and division, then the addition.

    Steps:

    1. (3/4 + 3/28 + 3/70 + 3/9700) + (1/420 + 1/462 + 1/6320)

    2. (0.9003092784 ...) + (0.004703682394 ...)

    3. Answer = 0.9050129608

    Of course for the actual answer your teacher may wanted it rounded.
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