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AS 1 Pure Mathematics

Quick questions on Integration: indefinite and definite integrals and the area under a curve - CCEA A-Level Mathematics

5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is integrating powers of x?
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To find a particular function from its gradient function, integrate and then use a known point (a boundary condition) to fix the constant cc.
What is areas below the axis?
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Where a curve dips below the xx-axis, the definite integral over that part is negative, because the signed area is below zero. To find the total geometric area, integrate each region separately between the relevant roots, take the modulus of any negative result, and add the magnitudes.
What is q1?
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Find (4x3+2)dx\int (4x^3 + 2)\,dx. [2 marks]
What is q2?
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Evaluate 126xdx\int_1^2 6x\,dx. [2 marks]
What is q3?
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A curve has dydx=2x+1\frac{dy}{dx} = 2x + 1 and passes through (0,5)(0, 5). Find yy. [3 marks]

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