137. do dw if w = Vet - ] 138. f ' ( 2 ) if f ( x ) = 2x - 1 1- x 139. f ' ( 1 ) if f ( x ) = V2 - x 140. f ' ( 1 ) if f ( t ) = 2t + 5 Vt - 1 10,000 141. A certain boat depreciates in value according to the formula V = where t is the ...