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What is `int (x^(2) + 1)^((5)/(2))x dx` equal to ? where c is a constant of integrationA. `(x^(2) + 1)^((7)/(2)) + C`B. `(2)/(7) (x^(2) + 1)^((7)/(2)) + c`C. `(1)/(7) (x^(2) + 1)^((7)/(2)) + c`D. None of the above |
Answer» Correct Answer - C Let `I = int x (x^(2) + 1)^(5//2) dx` Put `x^(2) + 1 = t` `2xdx = dt` `xdx = (dt)/(2)` `:. I = int (t)^(5//2) (dt)/(2) = (1)/(2) ((t^(7//2))/(7//2)) + c = (1)/(7) (x^(2) + 1)^(7//2) + c` |
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