Question

please tell me the answer of this question 4Q please tell my friends ​

Answer 1

Step-by-step explanation:

(1) Given that,

• n(A)=15
• n(AUB) =29
• n(A intersection B)=7
• n(B) = ?

By using the formula ,

• n(AUB) = n (A) + n(B) - n( A intersection B)
• n(B) = 29+7-15
• = 36-15
• = 21

2) We have to find the order of the surd ³√7

• A root of a positive real quantity is called a surd.

• A surd with index of root 3 is called a third order surd.

• If x is a positive integer with nth root, then n is called the surd when the value is irrational.

• Hence, we can say In expression n is the order of surd and x is known as radicand.

∴ In the given question, the order of the surd ³√7 is 3

(3) Since, ³√51 = (3×17)⅓

So, ³√51 is a surd.

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Answer 2

Roster Notation: The set of even counting numbers is {2, 4, 6, 8, 10, …}.