SOLUTION: S50, when a1 = 6 and d = 2/7

SOLUTION: S50, when a1 = 6 and d = 2/7

Algebra.Com

Question 976758: S50, when a1 = 6 and d = 2/7
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
a(n) = a(1) +(n - 1)d
a(50) = 6 + (50 - 1)2/7
a(50) = 6 + 14
a(50) = 20
S(n) = [n(a(1)+ a(n)]/2
s(50) = [50(6 + 20)]/2
s(50) = 650
Hope this helps:-)
RELATED QUESTIONS
S25, when a1 = 32 and d =... (answered by Cromlix)

If a1 = 4 and d =2 (answered by richwmiller)

Find the indicated term of the arithmetic sequence with first term, a1, and common... (answered by ewatrrr)

ﬁnd the indicated term of the arithmetic sequence with ﬁrst term, a1,... (answered by stanbon)

ﬁnd the indicated term of the arithmetic sequence with ﬁrst term, a1,... (answered by ewatrrr)

find n for the series for which an =138 a1 =-2 and... (answered by richwmiller)

Find the first three terms of the sequence, An=-2+(1-n)(-7). The correct answer is one (answered by greenestamps)

A. -6 B.-4 C. 2 D. 3 +3*A1 + 2*B1 E= +C1*(A1 + 5*B1) E= +A1 + ⋯ + D1... (answered by Fombitz)

A1= 7, An= -20, Sn = -65 determine n and... (answered by tommyt3rd)