Question: 1. Prove by induction that 1 + 2 + 3 + - - - -- _ _ n(n-1) (2n + 1) 2. Find Dy,

1. Prove by induction that 1 + 2 + 3 + -

1. Prove by induction that 1 + 2 + 3 + - - - -- _ _ n(n-1) (2n + 1) 2. Find Dy, Dy, Dy, Dy for each of the following: 3 sin 2r, (=) y(z) = 3z, (b) y(z) 3. Find Dr, Dr, Dr for each of the following: (b) r(8) (a) 7(6) = cos @ + tan 8. 1 (c) r(6) (c) y(z)

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