Question

A= { p:p ε W, 2p-3<8} Find n(A)

Answer 1

Answer:

n(A)={2,3,5}

Step-by-step explanation:

here tells about prime no.. which is starts from 2

now

2*2-3=1<8..i.e, 2is an element

2.3-3=3<8....i. e, 3is an element

2.5-3=7<8...i. e, 5is an element

we will stop here coz further we will not find element which is less than 8

therefore

n(A)={2,3,5}

Answer 2

Answer:

6

Step-by-step explanation:

A= { p:p ε W, 2p-3<8}

at p= 0 2 X 0-3= -3<8

at p=1 2 X 1-3=-1<8

at p=2 2 X 2-3=1<8

at p=3 2 X 3-3=3<8

at p=4 2 X 4-3=5<8

at p=5 2 X 5-3=7<8

at p=6 2 X 6-3=9>8

A = { 0,1,2,3,4,5}

n(A) = 6