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(See whiteboard for step by step process) First, we write down the function we want to integrate (3x2), and include the limits at the top and bottom of our integration sign to show that it's a definit...
This differentiation requires use of the chain rule. The first step is to differentiate the whole thing, treating the bracket as u, so u=1+2x2. Therefore we are differentiating u1/2....
2kx + 6ky + 4kz
=2k (x + 3y + 2z)
Since 1/5 of the class is absent, this must mean that 4/5 of the class is present. We are told that 24 pupils are present, so 4/5 of the class must equal 24 pupils. Now we need to find out how many pupils...
6a + b = 16 Equation 1 5a - 2b = 19 Equation 2
Scale up one equation so both equations have same coeffient of one variable ie 2 times Equ 1
12a + 2b = 32 5a - 2b = 19
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