Determine the equation of the tangent to f(x) = = + x at the point (1, 2). XWe know that if fox, is a function then its derivative by wing first principle is given fox , = um ( f(xthi - fox) ) fto h f ( * ) = . + x = 1 7 ( x ) = lim to + (eth) ) - (xtx) hto 7 f (x ) = 4m hto xth txth - 1 -x ) x = ) $1 ( x ) = + ath X = ) fox ) = ym x - (ath) + h( x ) (ath ) hto ( ath) & = 1 f (x ) = lim x - x - hit hx + he hre ( rith )