Prakash Tiwari and Ishita Joshi Solutions for Chapter: Sets, Exercise 5: Let's Practice

State whether the following set is finite or infinite.

$A=\left\{1, 2, 3, 4, 5\right\}$

State whether the following set is finite or infinite.

$B=\left\{a:a=\frac{1}{b}, b\in N\right\}$

State whether the following set is finite or infinite.

$C=\left\{0.1, 0.2, 0.3,...\right\}$

State whether the following set is finite or infinite.

$D=\left\{-5, -4, -3, -2, -1, 0, 1, 2, ....\right\}$

State whether the following set is finite or infinite.

$E=\left\{x:x\in N\right\}$

Determine the cardinal number of the following set. (Mention the answer in the numerical form)

$S=\left\{natural numbers greater than 1 and less than 2\right\}$

Determine the cardinal number of the following set.

$T=\left\{x:x\in Z and -8<x⩽2\right\}$

Determine the cardinal number of the following set. (Mention the answer in the numerical form)

$L=\left\{x\overline{)x=\frac{1}{n},n<6 and n\in N}\right\}$