The sum of the first 20 terms of the series 1 + 3/2 + 7/4 + 15/8 + 31/16 +..., is:

Sequence and Series: JEE Main 2018 Mathematics question

JEE Main 2018 · 16 Apr, Morning shift · Q5299

JEE Main 201816 Apr, Morning shiftMathematicsMediumSequence and Series179× since 2002

The sum of the first 20 terms of the series

1 + {3 \over 2} + {7 \over 4} + {{15} \over 8} + {{31} \over {16}} + ...,

is :

JEE Main 2018 · 16 Apr, Morning shift · Q5299

JEE Main 201816 Apr, Morning shiftMathematicsMediumSequence and Series179× since 2002

The sum of the first 20 terms of the series

1 + {3 \over 2} + {7 \over 4} + {{15} \over 8} + {{31} \over {16}} + ...,

is :