Theorem. If there are r series of observations X1, X2, ... X, then the mean M of the whole series is related to the means M1, M2, ...,. „ M, of the component series by the equation NM = N,M1+ N2M2 + + N,M, ...

Q: Prove that AAB = (AU B) - (An B),

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Q: [L,,2] - [D,C]

A: Since all are  represent  unit vector .

Q: Show that both ℝ and ℝ2 may be covered by countably many open balls.

A: The answer provided below has been developed in a clear step by step manner.

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A: Solution...

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Q: prove that div A マ - Kr

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A: To show that ℝ and ℝ2 covered by countably many open balls.

Q: A counterexample can be used to prove a theorem is false. O True O False

A: We have to check

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Q: dz

A: Wallis FromulaFor  positive integer n∫0π2sinn x dx=∫0π2cosn x dx       If n is even   1.3.5. ...…

Q: What is the dimension of P,?

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A: Given, 10

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A: we have to find the limit of the expression