Zadanie 1a
Find (i) the tangent gradient at A; (ii) the normal gradient at A.
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 23 zadania z tego arkusza, razem 80 punktów, każde z kluczem i schematem punktowania.
Find (i) the tangent gradient at A; (ii) the normal gradient at A.
Write an equation of the normal at A.
Find B. You may use the normal equation y=x/2−27/2.
Find the length BV.
Find angle BVC.
Sketch f for −3≤x≤3.
A horizontal stretch by factor k, followed by a vertical translation by c, transforms f into g. Find k,c.
Show that the combined area is (π − 0.4)(144 − r2).
(i) Find r. (ii) Find the total boundary length of both pieces, including every radial end.
Find q.
Find the total distance travelled from t=0 to t=q.
A discrete variable X takes values 0,2,5,7 with respective probabilities k,k²,a,k³, where a,k>0. Given E(X)=3.4, find a.
Show that S(x) = 108/x + 3πx2.
Use S(x) = 108/x + 3πx2. (i) Find S′(x). (ii) Find the exact positive stationary radius a.
For S(x) = 108/x + 3πx2 and a = (18/π)1/3: (i) find S″(x); (ii) use S″ to justify a minimum at a; (iii) find the minimum area.
Find the total grant under (i) Plan A; (ii) Plan B.
Write an expression for the reserve value after n years.
(i) Find total retained grant plus reserve at the end of month 6. (ii) Find the least number of complete months before this combined value reaches at least 165000 dollars.
After the grant ends,25000 dollars are invested for five years at a nominal annual rate r%, compounded quarterly. The balance becomes 34000 dollars. Find r.
Find P(42.2<H<47.8).
Find μ and σ.
For 60 independent readings, find (i) the probability exactly 15 are slow; (ii) the probability exactly 15 are slow, given fewer than 24 are slow.
Find the standard deviation d for the second calibration F.
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