1.The sum to nnn terms of the series 12+34+78+1516+…\frac{1}{2} + \frac{3}{4} + \frac{7}{8} + \frac{15}{16} + \dots21+43+87+1615+… isa.n+12n−1n + \frac{1}{2^n} - 1n+2n1−1b.111c.n(12−1)n\left(\frac{1}{2}-1\right)n(21−1)d.1+2n1+2^n1+2nLogin to continueOnly logged in users canattempt or see the solution.
