Question

Xn = -4n + 3 Find the sum of 30 terms?​

Answer 1

Answer:

X30 = -4 ( 30) +3

= -120+3

= -117

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Answer 2

$sn \: = \: - 4n + 3 \\ s30 = - 4(30) + 3 \\ \: \: \: \: \: \: \: \: = \: - 120 + 3 \\ \: \: \: \: \: \: \: \: = \: - 117$