Q1.f(x) y³-y²-y-1 find f(y+1)
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Explanation:
Given :
f(y) = y³ - y² - y - 1
To find :
f(y + 1)
f(y) = y³ - y² - y - 1
f(y) = y² ( y - 1) - ( y + 1)
Now,
f(y +1) = (y + 1)² ( y + 1 - 1) - ( y + 1 +1)
f(y +1) = y ( y + 1)² - ( y + 2)
f(y +1) = y ( y² + 1 + 2y) - y - 2
f(y +1) = y³ + y + 2y² - y - 2
f(y +1) = y³ + 2y² - 2
Therefore, If f(y) = y³ - y² - y - 1 then, f(y+1) = y³ + 2y² - 2
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