For any real numbers r and s such that `r nes`, let `r…s` be defined by `r….s=(r-s)/(r+s)`. If `r-s=63 and r…s=9`, what is the value of r?

If the function r(s) is defined as 2s+3 for all values of s and r(4)=x, what is the value of r(x)?

If 4r+7s=23 and r-2s=17 then 3r+3s=

If r and s are two positive numbers and r is 25% greater than s, what is the value of the ratio r/s?

If r and s are any real numbers such that 0 le s,r le 1 and r+ s=1, then what is the. maximum value of the product rs ?

The operation & is defined as r & s =(s^(2)-r^(2))/(r+s) where r and s are real number and r ne -s . What is the value of 3 & 4?

Let S be the set of all real numbers and let R be the relation in S defined by R = {(a,b), a leb^2 }, then

if P,q, r, s in R such that p r= 2 ( q+ s) then

Let S be the set of all real numbers and let R be a relation in s, defined by R={(a,b):aleb}. Show that R is reflexive and transitive but not symmetric .

Let S be set of all real numbers and let R be relation on S , defined by a R b hArr |a-b|le 1. then R is

Let S be the set of all real numbers and let R be a relation in s,defined by R={(a,b):aleB^(2)}. show that R satisfies none of reflexivity , symmetry and transitivity .