Zadanie 9b
Use 9a and the substitution u=cos2x to evaluate .
Split a proper rational expression with two distinct linear denominator factors into simpler fractions.
Tę umiejętność sprawdza 12 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Use 9a and the substitution u=cos2x to evaluate .
Use partial fractions to show f(x) = 3/(x + 4) − 5/(x + 2).
Express as .
Hence show that , determining the positive constant p.
Consider with x ≠ 0, y ≠ 3x/2 and y ≠ −x/2. Under the substitution y = vx, this becomes . Using partial fractions, show that…
Find constants A,B such that (1 + v)/(1 − 9v2) = A/(1 − 3v) + B/(1 + 3v), for v≠±1/3.
Solve the given differential equation using y=vx and show that its initial-value solution satisfies x8(3y − x)2 = x + 3y.
Write 1/Q(x) = A/(x − 1) + B/(2x − 1) and find A,B.
Hence or otherwise show 1/[(x − 1)Q(x)] = 4/(2x − 1) − 2/(x − 1) + 1/(x − 1)2.
Find .
(i) Solve the differential equation and show that y = (15x + x5)/(5 − x4) on its initial-value branch. (ii) Find the actual value y(1.4). (iii) Use the graph of this solution to explain why five Euler steps of 0.08 from (1,4) give a poor estimate at 1.4.
Solve the differential equation with P(0)=P₀ and show that .
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