find the sum to n term of AP 5,2 - 1 - 4 - 7
Answers
Answered by
33
Number of terms (n) : 5
a = 5
am = l = - 7
Sum of this A. P
Sn = n/2 (a + L)
S5 = 5/2 [5 + (-7)]
S5 = 5/2 x (-2)
= - 5
THEREFORE, the sum of this A. P. = - 5
a = 5
am = l = - 7
Sum of this A. P
Sn = n/2 (a + L)
S5 = 5/2 [5 + (-7)]
S5 = 5/2 x (-2)
= - 5
THEREFORE, the sum of this A. P. = - 5
Answered by
7
Answer:
Hey mate
Tn = 8 - 3n
Step-by-step explanation:
Tn = a + (n - 1)d. [ a = 5 , d = (-3) ]
Tn = 5 + ( n - 1) * (-3)
Tn = 5 + [ (-3n) + 3 ]
Tn = (5 - 3n + 3)
Tn = (5 + 3 - 3n)
Tn = 8 - 3n.........(answer)✌️✌️
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