what is the sum of the first thirty terms of the arithmetic sequence 50,45,40,35,....?
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what is the sum of the first thirty terms of the arithmetic sequence 50,45,40,35,....?
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Step-by-step explanation:
50, 45, 40, 35, 30, 25, 20, 15, 10, 5, 0, -5, -10, -15, -20, -25, -30, -35, -40, -45, -50, -55, -60, -65, -70, -75, -80, -85, -90, -95
Sn = n(a1 +an) / 2
S30 = [30 (50+ (-95)] / 2
S30 = 30 (-45) / 2
S30 = -1350 / 2
S30 = -675
hope it will help u
Answer:
The answer is
Step-by-step explanation:
The answer is 170
Hope this will help u