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IceJOKER [234]
4 years ago
12

A1=1 , an= 4a n-1 -1

Mathematics
1 answer:
Readme [11.4K]4 years ago
4 0
<span>for part (a) find the sum of the first n terms of the arithmetic series. for part (b) find n for the given sum Sn.
45. 3+8+13+18+23+...
a. n=20
b. Sn=366
46. 50+42+34+26+18+...
a. n=40
b. Sn=182
47. -10+(-5)+0+5+10+...
a. n=19
b. Sn=375
48. 34+31+28+25+22+...
a. n=32
b. Sn=-12
49. 2+9+16+23+30+...
a. n=68
b. Sn=1661
50. 2+16+30+44+58+...
a. n=24
b. Sn=2178
</span>
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4 0
3 years ago
Please help answer!!!!
user100 [1]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
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denpristay [2]

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Step-by-step explanation:

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Therefore, the answer is 2.

I hope this helps!! Pls mark brainliest :))

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