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Question

Find the 7th term in the expansion of 3x2-1x310.

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Solution

We need to find the 7th term of the given expression.
Let it be T7
Now, we have
T7=T6+1
=C610(3x2)10-6-1x36=C61034x81x18=10×9×8×7×814×3×2×x10=17010x10

Thus, the 7th term of the given expression is 17010x10

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