find the sum of the first 30 term of an a.p whose Nth term is 2-3n
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Answered by
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an= 2-3n
a1= 2-3(1)
= -1
a2= 2-6
= -4
d= -4 +1
= -3
sn= n/2 [ a + (n-1) d ]
= 15[ -1 + (29 ) -3]
= 15 [ -1 - 87]
= 15 × - 88
= -1320
Mark as the brainliest answer
a1= 2-3(1)
= -1
a2= 2-6
= -4
d= -4 +1
= -3
sn= n/2 [ a + (n-1) d ]
= 15[ -1 + (29 ) -3]
= 15 [ -1 - 87]
= 15 × - 88
= -1320
Mark as the brainliest answer
87 nahi 88 ayega
last 3rd steo me
step*
no
you are right
sorry
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