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The pluperfect tense is used when talking about events and actions that happened back in the past before a later time in the past where something else happened. It is the english equivalent of e.g. I had tak...

def withoutIndex (lst, i): return lst[ : i] + lst[i + 1 : ]def printSublists(lst): print(lst) for i in range(len(lst)): printSublists(withoutIndex(lst, i))printSublists([1, 2, 3])

1/y² dy/dx = sec²(x)∫ 1/y² dy/dx dx = ∫ sec²(x) dx-1/y + C 1 = tan(x) + C 2 y = -1/(tan(x) + A) where A = C 2 - C 1 y(0) = -1/A so y(0) = 1 means A = -1. Finished!

To help the student understand how to expand the brackets I would start by splitting the equation to:3x 2 (x - 3) + 6x(x - 3) + 7(x - 3)I then would ask the student to expand these brackets to:3x 3 - 9x 2 + ...

Palaeomagnetism deals with the past magnetic states of the earth. In the 1900's geographers were interested in the mid Atlantic ridge, its on a constructive plate margin, meaning the crust further away from ...