brosnan123

3 Questions
2 Answers

0

855

1

+16

Mutually Exclusive Events

Question :- If A and B are two mutually exclusive events the probability of occurring A or probability occurring B is P(A) + P(B).
P(A or B) = P(A) + P(B)
What is the probability of a die showing 5 or 3 when it is rolled down?

brosnan123 Jul 25, 2013

0

761

0

+16

Discrete Math

Question:- Find the sum of all four digit numbers formed by using 2, 3, 6, 9 in which no digit is repeated.?

brosnan123 Jul 22, 2013

0

921

2

+16

Number System

Question :- For given sequence, find the first four terms.
(60 - x) + x + (35 - x) = 80
x = 95 - 80 = 15 ?

brosnan123 Jul 19, 2013

+16

0

Answer :- -3( 3x+6) < = -9

- 9x - 18 < = -9

- 9x ≤ 18 - 9

- 9x ≤ 9

- x ≤ 9/9

- x ≤ 1

x ≤ - 1

This would help you better Systems of Inequalities - http://math.tutorvista.com/algebra/system-of-inequalities.html .

brosnan123Jul 17, 2013

+16

0

Answer:-
newton's method - http://math.tutorvista.com/calculus/newton-raphson-method.html to find the largest positive solution is
f(x)=x^4-7x^2-8
f'(x) = 4x^3 -14x

Start out with an initial value x0=4
x1 = x0- f(x0)/f'(x0)
x1 = 4 - f(4)/f'(4)
x1 = 4 - 136/200 = 3.32

x2 = x1 - f(x1)/f'(x1)
x2 = 3.32 - f(3.32) /f'(3.32)
x2 = 3.32 - 36.3365 / 99.8975
x2 = 2.95626205

Proceed this way for 6 more iterations.
x = 2.95626205 7.2022062431
x = 2.84001712 0.5955914357
x = 2.82853399 0.0054411498
x = 2.82842713 4.682e-70000
x = 2.82842712 0.0000000000

x=2.82842712

brosnan123Jul 12, 2013