Question

write the following in roster form
A={x|x is a two digit natural number whose sum of digits is 9}
B={x|x=4n,n E W,x is smaller than 20}​

Answer 1

Answer:

A={x|x is a two digit natural number whose sum of digits is 9}

A = { 18, 27,36,45,54,63,72,81 }

B={x|x=4n,n € W,x is smaller than 20}

B = {0,4,8,12,16 }

Therefore.,

A = { 18,27,36,45,54,63,72,81 }

B = { 0,4,8,12,16 }

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