CBSE Class 12-science Answered
EXPERTS I SHOULDN'T POST 3 QUERIES AT A TIME BUT ITS URGENT I HAVE TEST TOMORROW. SOLVE ALL 3 QUERIES.
1.Let Q+ denote the set of all positive rational numbers.
A relation R on Q+ × Q+ is defined as . Show that R is an equivalence relation.
2. Let A = R − {0} and B = A × R. .Let the binary operation * on B be defined as (a, b) * (c, d) = .(i) Find the identity element of B with respect to the operation *. (ii) Show that set B is invertible with respect to the operation *.Also, find the inverse of (−5, 3).
3.A function f: Z → A, whereis defined as.
Without finding the actual inverse of f, show that f is bijective.
Asked by nikitaayyagari | 28 Apr, 2016, 01:29: PM
Expert Answer
Answered by Vimala | 29 Apr, 2016, 09:01: AM
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