Zadanie 1a
Show that f(x) = 2x − 1 − 6/x.
Justify elementary numerical or algebraic claims through a logically connected sequence of equivalent statements.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Show that f(x) = 2x − 1 − 6/x.
Express y in terms of x.
Show that T = 9x + 144/x.
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…
Show that .
Prove that (4n + 7)2 − (4n − 7)2 is divisible by 28 for every positive integer n.
Prove that (5n + 3)2 − (5n − 3)2 is divisible by 30 for every positive integer n.
Prove that their sum is divisible by 3.
Prove that the sum of their squares is never divisible by 3.
Show that (4t)2 + (t2 − 4)2 = (t2 + 4)2.
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