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How many pairs of positive integers (a, b) satisfy 1/a} + 1/b}=2/7?
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In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.
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The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.
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How many pairs of positive integers (a, b) satisfy 1/a} + 1/b}=2/7?...
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