Express the sum of the first 50 terms of the sequence in sigma notation: −1,−1/6,−1/36, . . . .(1 point) Responses ∑50n=1(−1)(16)n−1 sigma-summation underscript n equals 1 overscript 50 End Scripts left parenthesis negative 1 right parenthesis left parenthesis Start Fraction 1 over 6 End Fraction right parenthesis superscript n minus 1 baseline ∑50n=1(−16)(−1)n−1 sigma-summation underscript n equals 1 overscript 50 End Scripts left parenthesis negative Start Fraction 1 over 6 End Fraction right parenthesis left parenthesis negative 1 right parenthesis superscript n minus 1 baseline ∑50n=1(−1)(50)n−1 sigma-summation underscript n equals 1 overscript 50 End Scripts left parenthesis negative 1 right parenthesis left parenthesis 50 right parenthesis superscript n minus 1 baseline ∑1n=50(−1)(−16)n−1