f(x) = 5x + 2, g(x) = x^2 - 14x হলে f(g(2)) এর মান কত?
Solution
Correct Answer: Option A
দেওয়া আছে,
f(x) = 5x + 2
g(x) = x² - 14x
এখন,
g(x) = x² - 14x
g(2) = (2)² - 14(2)
বা, g(2) = 4 - 28
বা, g(2) = -24
আবার,
f(x) = 5x + 2
বা, f(-24) = 5(-24) + 2
বা, f(-24) = -120 + 2
বা, f(-24) = -118
সুতরাং f(g(2)) = -118
f(x) = 5x + 2
g(x) = x² - 14x
এখন,
g(x) = x² - 14x
g(2) = (2)² - 14(2)
বা, g(2) = 4 - 28
বা, g(2) = -24
আবার,
f(x) = 5x + 2
বা, f(-24) = 5(-24) + 2
বা, f(-24) = -120 + 2
বা, f(-24) = -118
সুতরাং f(g(2)) = -118
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