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If for n=4 the approximate value of inte...

If for `n=4` the approximate value of integral `int_(1)^(9)x^(2) dx` by trapezoidal is `2[(1/2)(1+9^(2))+alpha^(2)+beta^(2)+7^(2)]` then

A

`alpha=1,beta=3`

B

`alpha=2,beta=4`

C

`alpha=3,beta=5`

D

`alpha=4,beta=6`

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