Which of the following binary operations is not commutati...
Which of the following binary operations is not commutative?
\(a * b = \frac{1}{a} + \frac{1}{b}\)
\(a * b = a + b - ab\)
\(a * b = 2a + 2b + ab\)
\(a * b = a - b + ab\)
Correct answer is D
All other options given are commutative i.e. \(a * b = b * a\), except option D.
\(a * b = a - b + ab\)
\(b * a = b - a + ba\)
\(a - b = -(b - a) \neq b - a\)
In which of the following series can be the formula S = \(\frac{a}{1 - r}\) where a is the firs...
Find the fifth term in the binomial expansion of \((q + x)^7\)....
(\(\frac{3√6}{√5} + \frac{√54}{3√5}\))\(^{-1}\)...
Evaluate \(\int^0_0 \sqrt{x} dx\)...
A curve is given by \(y = 5 - x - 2x^{2}\). Find the equation of its line of symmetry....
Given that P = {x : 2 ≤ x ≤ 8} and Q = {x : 4 < x ≤ 12} are subsets of the universal set...
The table shows the distribution of the distance (in km) covered by 40 hunters while hunting. ...