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Gnoma [55]
3 years ago
14

Find the sum of the first twenty terms of an arithmetic progression 16+9+2+(-5)+...

Mathematics
1 answer:
Pie3 years ago
7 0
16 + (16-7)+ (16-2*7)+(16-3*7)+.......+ (16-19*7)=
20*16-7(1+2+....+19)=20*16-7*19*20:2=320- 1330= -1010
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Answer:

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Step-by-step explanation:

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3 years ago
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4 years ago
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adoni [48]

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Step-by-step explanation:

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3 years ago
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a bag of peaches has 3 more than 2 times the number of bananas in a bag of bananas. if there are 17 peaches in a bag, how many b
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