Question

Calculate the sum: (-125) + 125 + (-125) + ...
(i) if the number of terms is 30​

Answer 1

Answer:

here 0(zero) is answer

Step-by-step explanation:

As one is of + sign and another of - sign so all cancelled and zero remains as answer

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Answer 2

Answer:

–235

Step-by-step explanation:

n/2{2a+(n–1)d}

30/2{2(-125)+(30–1)0}

30/2{–250+0}

15–250=–235