Let y1, . ... Yn real numbers, and let n y = 1/√ Σ² ²=1 Yi n their arithmetic mean. Show that for any real number a the formula holds n - n - - Σ (Yi − a)² = Σ (Yi − ÿ)² + n(ÿ − a)² i=1 i=1 Guidance: start from the presentation (yi - a)² = (Yi − ÿ †ÿ − a)² -

Q: value of ∑n=1∞(6an+9bn) if ∑n=1∞an=8 and ∑n=1∞bn=2.

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Q: (i) (Z- Q) and specified in it using the most concise notati

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Q: .(1) t is straightforward to show that y = k-1 is a solution to the homog quation

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Q: 4. Let h(r) = 5 x 6 20 x²3x18 Find all values of N for which h(N) = 3.

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A: We have used the basic multiplication rules of matrices.

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