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Find the value(s) of a for which f(x) = – ax is an increasing function on R ?
f(x) = – ax
Given that f(x) is on increasing function
for all x R
⇒ for all x R
⇒ a < for all x R
But the last value of 3x2 = 0 for x = 0
∴a ≤ 0