Use the definition of continuity and the properties of limits to show that the function is continuous at the given nur F(x) = (x+ 2x5)", a=-1 lim f(x) = lim x+-1 X - - 1 O lim by the power law x 4 - 1 = lim (x) + lim x 4 - 1 by the sum law = lim (x ) + lim (x5) ) by the multiple constant law - (-1+ 21 by the direct substitution property Find f(-1). f(-1) = Thus, by the definition of continuity, fis continuous at a = -1. Need Help? Read It Watch It