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If N is the number of positive integral solutions of `x_1x_2x_3x_4 = 770`, then N =A. `256`B. `729`C. `900`D. `770` |
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Answer» Correct Answer - A `(a)` `770=2xx5xx7xx11` We can assign `2` to `x_(1)`, or `x_(2)` or `x_(3)` or `x_(4)`. Thus `2` can be assigned in `4` ways similarly each of `5,7,11` can be assigned in `4` ways No. of solutions `=4xx4xx4xx4=256` |
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