2021-AL-MATHEMATICS-PART-I-SINHALA-MEDIUM-AlevelApi-PDF

15.(a) x +Bx(x2+1) + Cx2 A, B C 3 + 3x3 + 4x2 +3x+1 x(x2 +1)2 x 4 + 3x3 + 4x2 + 3x + I dx x dx I x(x2 + I = — sin 24 2 +1) +2 tan—I x In(x2 +1) ôQ (c) In(x2 + I)dx In(x2 4) âO — x)dx 16. P ax+bY+c=0 P 10 (Xl + at, + bt) laxl + byl + cl P 10 x+Y—2 0Bg.Ä (O, 6) B (3, —3) I S I AB I zaóD, A Sr S2 I AB C C S 3x2 + 3y2 — 38x — 22y = 0 ................
................