By giving a counter example , show that the following statement is not true.
r: The equation `x^2-1=0` does not have a root lying between 0 and 2.

By giving a counter example, show that the following statement is not true:- q: The equation x^2 -1 = 0 does not have a root lying between 0 and 2.

By giving a counter example, show that the following statement is not true : The equation x^2-4= 0 does not have a root lying between 0 and 3.

By giving a counter example, show that the following statement is not true : p: If the angles of a triangle are equal, then the triangle is an obtuse angled triangle.

By giving a counter example, show that the following statement is not true:- p: If all the angles of a triangle are equal, then the triangle is an obtuse angled triangle.

By giving a counter example, show that the following statement is false. "If n is an odd integer, then n is prime.”

Find counter-examples to disprove the following statement: ) For integers a and b, sqrt (a^2 + b^2)= a+b

Find counter-examples to disprove the following statement: 2n^2+ 11 is a prime for all whole numbers n.

Show that the following statement is true by the method of contrapositive r: If is x is an integer and x^2 is even, then x is also even.

The roots of the equation 12 x^2 + x - 1 = 0 is :