exercise 1.1,question number 4

Asked by sriya surendran | 3rd Jun, 2013, 09:16: PM

Expert Answer:

(I) 3 = 3 × 1, 6 = 3 × 2, 9 = 3 × 3, 12 = 3 × 4.

So, {3, 6, 9, 12} = {x : x = 3n, n is a natural number less than or equal to 4.}

 

(ii) 2 = 21, 4 = 22, 8 = 23, 16 = 24, 32 = 25.

So, {2, 4, 8, 16, 32} = {x : x = 2n, n is a natural number less than or equal to 5.}

 

(iii) 5 = 51, 25 = 52, 125 = 53, 625 = 54.

So, {5, 25, 125, 625} = {x : x = 5n, n is a natural number less than or equal to 4.}

 

(iv) 2 = 2 × 1, 4 = 2 × 2, 6 = 2 × 3 ….

So, {2, 4, 6 … } = {x : x = 2n, n is a natural number.}

 

(v) 1 =12, 4 = 22, 9 = 32, … 100 = 102.

So, {1, 4, 9, … 100 } = {x : x = n2, n is a natural number less than or equal to 10.}

Answered by  | 4th Jun, 2013, 12:35: AM

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