RRB Government Jobs Exams

Function g is given by g(x) = 2(x - 3)(x- 7). Find the value of x that makes g(x)
maximum

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RRB Other Question

A rectangular picture measuring 10 cm by 15 cm is surrounded by a frame
with uniform width x. Write a quadratic function that gives the area A of the
frame as a function of x. Find the constant b so that the three points A(2 , 3), B(4 , 7) and C(8 , b) are
collinear (i.e. on the same line).