Question
Evaluate the following:
$\lim _{x \rightarrow 0}\left[\frac{3^x+3^{-x}-2}{x^2}\right]$
$\lim _{x \rightarrow 0}\left[\frac{3^x+3^{-x}-2}{x^2}\right]$
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$\lim _{x \rightarrow 4}\left[\frac{x^2+x-20}{\sqrt{3 x+4}-4}\right]$
(i) x + 3y + 2 = 0, 2x + 4y – k = 0, x – 2y – 3k = 0
(i) 3x + y – 2 = 0, kx + 2y – 3 = 0 and 2x – y = 3