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Maths Puzzle
Numerical Ability
If f(x) = x2 + 5, find f(a + h) − f(a)
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(x2+1/x2)(x+1)
On a flight to San Francisco, the pilot announced that he was 139 miles from the city, flying at an altitude of 35,000 feet. The pilot claimed that he could see the Golden Gate Bri