Question

4
5. Let's find, which one of the following numbers when added to x + 1x makes it a
perfect square.
(1)
(ii) - (iii) (iv) None of these
64
64
(
8​

Answer 1

Answer:

A={x:x is a perfect square,x<50,x∈N}

∴A={1,4,9,16,25,36,49}

B={x:x=8m+1, where m∈W,x<50,x∈N}

∴B={1,9,17,25,33,41,49}

Therefore,

A∩B={1,9.25,49}