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76 minutes.

(x^x)(ln(x)+1)

Waterfalls are found in the upper course of the river where a harder, more resistant band of rock sits on top of a softer, less resistant band of rock. The softer rock is more easily eroded, so it wears a...

u² = 2 + xx = u² - 2dx/du = 2u
ʃ x(2 + x))^1/2 dx= ʃ xu dx= ʃ u(u² - 2) dx= ʃ 2u² (u² - 2) du= ʃ 2u⁴ - 4u² du= [...

History naturally is a difficult subject even at GCSE in terms of remembering a huge amount of names and dates. However, I would reassure the student. I would guide them through revision techniques that o...