The first two terms of an arithmetic sequence are a1 = 2 and a2 = 4. What is a10,the tenth term? A. 19 B. 10 C. 18 D. 20
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a1=2
a2=4
d=4-2=2
t10=2+(10-1)2
= 2+18
= 20
a2=4
d=4-2=2
t10=2+(10-1)2
= 2+18
= 20
sumayyahegazy:
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An infinite geometric series has 1 and 1/5 as its first two terms: 1, 1/5, 1/25, 1/125, . . .
What is the sum, S, of the infinite series?
A. 1/4
B. 1
C. 5/4
D. 1/25
What is the sum, S, of the infinite series?
A. 1/4
B. 1
C. 5/4
D. 1/25
can you answer this ?
please
question can send image format
what
tn=(1/5)^n-1
yhanks
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