MATH 0120 Midterm: MAT-120 answers-2.4-362
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1 + 1 and (g f )(x) = ( x + 1)2: h(2) = g(f (2)) = g(7) = 49. 1: h(2) = g(f (2)) = g (cid:18)1. 5: g(x) = x5, f (x) = 2x3 + x2 + 1, g(x) = x f (x) = x2 f (x) = x2, g(x) = + x f (x) = 2x + 1. 51) (a + h)2 + 1 (a2 + 1) (a + h)3. 1 a+h h a(a+h) h a+h a(a+h) 1 a(a + h: (number of shares at time t)*(price per share at time t)=total price of shares at time t, c(x) = 12, 100 + 0. 60x. 60a) d(t) = 0. 33t2 + 1. 1t + 16. 9, d(4) = 26. 58 emails (in billions) that are not spam in 2007. To every 1. 46 billion emails sent in 2007, 1 billion were spam: c(x) = 100, 000 + 0. 000003x3. 63a) p (x) = r(x) c(x) = 0. 000003x3.
