Question

Find the sum of the sequence 5+10+15+............+100

Answer 1

1,050 the answer is that for your question and I added the number are in order as you given in the question

Answer 2

Answer:

1050

Step-by-step explanation:

Given sequence is in ap

first term a=5

difference d=5

nth term an = 100

no of terms n =?

an=a+(n-1)d

100=5+(n-1)5

100=5+5n-5

100=5n

n=20

sum of terms sn=n/2[2a+(n-1)d]

sn=20/2[2*5+(20-1)5]

sn=10[10+(19*5)]

sn=10[10+95]

sn=10[105]

sn =1050