(a)Maximise z = 4x + y subject to constraints : x + y `le` 50 3x + y `le ` 90 x `ge ` 0 y `ge` 0 by graphical method. (b) Find the value of K, if f(x) = `{{:(Kx + 1, "if"x le pi),(cos x, "if " x gt pi):}` is continuous at x = `pi`.
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The correct Answer is:
`(-2)/(pi)`
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