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Question 21
Find rt(t) given the following vector function. \text { Find } \mathbf { r } ^ { t } ( t ) \text { given the following vector function. } Find rt(t) given the following vector function. r(t) =−5t4i−4t5j+6t3k\mathbf { r } ( t ) = - 5 t ^ { 4 } \mathbf { i } - 4 t ^ { 5 } \mathbf { j } + 6 t ^ { 3 } \mathbf { k }r(t) =−5t4i−4t5j+6t3k
A) rt(t) =−5t3i−4t4j+6t2k\mathbf { r } ^ { t } ( t ) = - 5 t ^ { 3 } \mathbf { i } - 4 t ^ { 4 } \mathbf { j } + 6 t ^ { 2 } \mathbf { k }rt(t) =−5t3i−4t4j+6t2k B) rt(t) =−5t3i−4t2j+6t4k\mathbf { r } ^ { t } ( t ) = - 5 t ^ { 3 } \mathbf { i } - 4 t ^ { 2 } \mathbf { j } + 6 t ^ { 4 } \mathbf { k }rt(t) =−5t3i−4t2j+6t4k C) rt(t) =−20t3i+4t4j+6t2k\mathbf { r } ^ { t } ( t ) = - 20 t ^ { 3 } \mathbf { i } + 4 t ^ { 4 } \mathbf { j } + 6 t ^ { 2 } \mathbf { k }rt(t) =−20t3i+4t4j+6t2k D) rt(t) =−20t4i−20t5j+18t3k\mathbf { r } ^ { t} ( t ) = - 20 t ^ { \mathbf { 4 } } \mathbf { i } - 20 t ^ { 5 } \mathbf { j } + 18 t ^ { 3 } \mathbf { k }rt(t) =−20t4i−20t5j+18t3k E) rt(t) =−20t3i−20t4j+18t2k\mathbf { r } ^ { t } ( t ) = - 20 t ^ { 3 } \mathbf { i } - 20 t ^ { 4 } \mathbf { j } + 18 t ^ { 2 } \mathbf { k }rt(t) =−20t3i−20t4j+18t2k
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