Question

1. Show that there is no value of n for which (2" x 5") ends in 5.
OR
Determine the prime factorisation of positive integer: 45470971
2. Find the discriminant of the quadratic equation:
x2 + 2x +4 = 0
3. Obtain the condition for the following system of linear equations to have a unique
solution: ax + by = c and lx + my = n
4. From an external point C, k tangents can be drawn to the circle. Find the value of k.
5. Find the nth term. Given a = first term = 3.5, d = common difference = 0, n = 105, an​

Answer 1

Answer:

1- take lCM and then wrigt the answer as given below