Math, asked by nagargojesayali, 8 months ago

if A= { 3,4,5,6,7 } and B= { 6,7,8 } then find the value of n(A)+n(B)​

Answers

Answered by annukuku07
1

Answer:

It's right

Step-by-step explanation:

11th

Maths

Sets

Operations on Sets

If A = {1, 2, 3, 4, 5}, B =...

MATHS

If A={1,2,3,4,5},B={2,4,6,8} and C= {3,4,5,6},

then verify : A−(B∪C)=(A−B)∩(A−C).

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ANSWER

Given, A={1,2,3,4,5},B={2,4,6,8} and C={3,4,5,6}

For the LHS:

Union of two sets will have the elements of both sets.

So, B∪C={2,3,4,5,6,8}

A−(B∪C) will have elements of A which are not in (B∪C)

So, A−(B∪C)={1} ..... (1)

For the RHS:

A−B will have elements of A which are not in B.

So, A−B={1,3,5}

A−C will have elements of A which are not in C.

So, A−C={1,2}

Intersection of two sets has the common elements of both the sets.

⇒(A−B)∩(A−C)={1} ..... (2)

From (1) and (2), we have

A−(B∪C)=(A−B)∩(A−C)

Hence, the given expression is true

Answered by Hazarikaprabal
0

Answer:

40

Step-by-step explanation:

No.of elements in set A = 5

Hence n(A) = 2⁵

n(A) = 32 ........(i)

No. of elements in set B = 3

Hence n(B) = 2³

n(B) = 8 ..........(ii)

(i) + (ii),

32 + 8 = 40 ANS

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