Zadanie 2a
Find .
Integrate elementary functions and suitable composites using inspection, reverse differentiation or substitution.
Tę umiejętność sprawdza 19 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Find .
Find the displacement s(t).
Find the area bounded by y=f(x), the axes and x=3π.
Given E(X) = 4.8, find a.
Consider with x ≠ 0, y ≠ 3x/2 and y ≠ −x/2. Under the substitution y = vx, this becomes . Using partial fractions, show that…
A region is bounded above by y = 1 + e2x, below by y = 1 − 2e2x, and by the vertical lines x = 0 and x = ln 2. Find its exact area.
At the beginning of 2021, a sealed reservoir holds 420000 litres. Its modelled rate of water loss is described by litres per year, where t is years after the beginning of 2021. Find the volume predicted for the beginning of…
A separate function is h(x) = 9x2/(3x + 2), x ≠ −2/3. Region R is bounded by its curve, the line y = 1, and x = 1, x = 2. (i) Establish . (ii) Hence or otherwise, calculate the area of R in the form p + qln r, with positive…
Find d(t), using d(0)=75.
Let for . The region below this curve, above the x-axis and between x=0 and is rotated through 2π radians about the x-axis. Show that its volume is π/2.
Find .
The region under y=f(x), above the x-axis and within the stated interval is rotated through a full turn about the x-axis. Find the volume.
For x≥0, a region is bounded by y = 3x2/(x3 + 4), the x-axis and x=c, where c>0. Its area is ln3. Find c.
Find E(X) exactly.
Now take f=−2x/y and α=π/4, working locally where x>0, y≠0 and y+2x≠0. (i) Show that g=(y−2x)/(y+2x). (ii) Solve the homogeneous equation y′=(y−2x)/(y+2x) and give its general implicit form h(x,y)=d. You may use…
Evaluate .
A function g satisfies g′(x) = 4x3 − 6e−2x and g(0)=8. Find g(x).
Find E(X).
A differentiable function satisfies f′(x) = 10x/(x2 + 4) for real x and f(2)=1. Find f(x).
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