{"id":6825,"date":"2021-10-21T19:22:50","date_gmt":"2021-10-21T13:52:50","guid":{"rendered":"https:\/\/mathemerize.com\/?p=6825"},"modified":"2021-10-25T00:29:58","modified_gmt":"2021-10-24T18:59:58","slug":"if-displaystylelim_x-to-inftyx31over-x21-axb-2-then-find-the-value-of-a-and-b","status":"publish","type":"post","link":"https:\/\/mathemerize.com\/if-displaystylelim_x-to-inftyx31over-x21-axb-2-then-find-the-value-of-a-and-b\/","title":{"rendered":"If \\(\\displaystyle{\\lim_{x \\to \\infty}}\\)(\\({x^3+1\\over x^2+1}-(ax+b)\\)) = 2, then find the value of a and b."},"content":{"rendered":"
\\(\\displaystyle{\\lim_{x \\to \\infty}}\\)(\\({x^3+1\\over x^2+1}-(ax+b)\\)) = 2<\/p>\n
\\(\\implies\\) \\(\\displaystyle{\\lim_{x \\to \\infty}}\\)\\(x^3(1-a)-bx^2-ax+(1-b)\\over x^2+1\\) = 2<\/p>\n
\\(\\implies\\) \\(\\displaystyle{\\lim_{x \\to \\infty}}\\)\\(x(1-a)-b-{a\\over x}+{(1-b)\\over x^2}\\over 1+{1\\over x^2}\\) = 2<\/p>\n
\\(\\implies\\) 1 – a = 0, -b = 2 \\(\\implies\\) a = 1, b = -2<\/p>\n
Evaluate : \\(\\displaystyle{\\lim_{x \\to 0}}\\) \\(x^3 cotx\\over {1-cosx}\\)<\/a><\/p>\n Evaluate : \\(\\displaystyle{\\lim_{x \\to \\infty}}\\) \\(({7x^2+1\\over 5x^2-1})^{x^5\\over {1-x^3}}\\)<\/a><\/p>\n Evaluate : \\(\\displaystyle{\\lim_{x \\to 0}}\\) \\(xln(1+2tanx)\\over 1-cosx\\)<\/a><\/p>\n Evaluate : \\(\\displaystyle{\\lim_{x \\to 0}}\\) \\((2+x)sin(2+x)-2sin2\\over x\\)<\/a><\/p>\n