The Total solution for NCERT class 6-12
Answer - 11 : -
Answer - 12 : -
Answer - 13 : -
Answer - 14 : -
Answer - 15 : -
Equating the coefficientsof x and constant term on both sides, we obtain
4A = 4 ⇒ A = 1
A + B =1 ⇒ B =0
Let 2x2 + x −3 = t
∴ (4x + 1) dx = dt
Answer - 16 : -
From (1), we obtain
From equation (2), weobtain
Answer - 17 : -
Equating the coefficientof x and constant term on both sides, we obtain
Substituting equations (2)and (3) in equation (1), we obtain
Answer - 18 : -
Equating the coefficientsof x and constant term, we obtain
2A = 6 ⇒ A = 3
−9A + B =7 ⇒ B =34
∴ 6x + 7 = 3 (2x − 9) + 34
Substituting equations (2)and (3) in (1), we obtain
Answer - 19 : -
Using equations (2) and(3) in (1), we obtain
Answer - 20 : -
Let x2 +2x +3 = t
⇒ (2x + 2) dx =dt