Question

59=
S4=
(ii) Which of the following is the value of the discriminant for
√2x² – 5x + √2=0?
(A) - 5 (B) 17 (C) 2 (D) 2 2-5
y =
(iii) What is the sum of the first 20 terms of an A.P., if a=4 and 120 = 36?
(A) 40 (B) 200 (C) 400 (D) 800
(iv) Which number cannot represent a probability?
(A) 15% (B) (C) 0.7 (D) 1.5​

Answer 1

Answer:

Hi , Compare √2x² - 5x + √2 = 0 with ax² + bx + c = 0 , we get a = √2 , b = -5 , c = √2 discreaminant ( D ) = b² - 4ac