Home
Class 6
MATHS
Let us invent an operation * for integer...

Let us invent an operation * for integers such that fortwo integers a and b.
a * b = a+b+(-2a)
Determine(-4)*5

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

If the binary operation * on the set Z of integers is defined by a * b = a+B - 5, then write the identity element for the operation * in Z.

Let a binary operation '*' be defined on I (set of integers) by : a * b = 2a + 2b for a, b in I. Prove that given operation is commutative but not associative.

Write the converse of the following statement : If two integers a and b are such that a > b, then (a-b) is always a positive integer.

Let ** be binary operation on the set of of rational numbers given as a**b = (2a-b)^2, a, b inQ. Find 3 **5 and 5** 3 .

Let '*' be the binary operation defined on N by the rule a * b = 3 a + 4 b - 2. Find 4 * 3.

Let * be a binary operation on set R of real numbers defined by a * b = a + b where a, b in R . then the value of 4 * (5 * 6) is :

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = a-b, for a , b in Q. Find which of the binary operations are commutative and which are associative.

Let '*' be the operation defined on the set Z of integers by the rule a*b=a +b + 1 for all a , b in Z, write down the identity element for this operation.