WAEC - Further Mathematics (2024 - No. 35)
Given that y = 2x - 1 and Δx = 0.1, find Δ y
0.20
0.15
0.10
0.05
Explicació
Given the function y = 2x − 1 and Δ x = 0.1.
Δy = f(x - Δx) - f(x) = [(2(x + 0.1) − 1) − (2x − 1)]
Δy = 2x + 0.2 - 1 - 2x + 1 = 0.2.