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Two lines are parallel if they have the same gradient. The general equation for a straight line is y=mx+c, where m is the gradient and c is the y-intercept. If these lines are parallel, then m will be the...

d^2y/dx^2 = 48x^2 - 18x -12

7^9

mn(5l^2-3nl-n)

Stem cells are undifferentiated cells with the ability to differentiate to form specialised cells, such as erythrocytes and neurons, or to self-r...