JEE Math Practice Question
The sum 1 + 2 . 3 + 3 . 32 + ......... + 10 . 39 is equal to :
- A.$${{2\,.\,{3^{12}} + 10} \over 4}$$
- B.$${{19\,.\,{3^{10}} + 1} \over 4}$$
- C.$$5\,.\,{3^{10}} - 2$$
- D.$${{9\,.\,{3^{10}} + 1} \over 2}$$
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