Q7 of 29 Page 1

Differentiate with respect to x.

dividing numerator and denominator by cos x we get,





Differentiating with respect to x we get


Hence, on differentiating with respect to x we get,

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Prove that .

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If be such that A–1 = kA, then find the value of k.

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The total revenue received from the sale of x units of a product is given by R(x) = 3x2 + 36x + 5in rupees. Find the marginal revenue when x = 5, whereby marginal revenue we mean the rate of change of total revenue with respect to the number of items sold at an instant.

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Find: