Math, asked by ashwinsuraj2, 7 months ago

Find the following sums  5+10+15+20+ ..........+100 *

Answers

Answered by rinisen
2

Answer:

Step-by-step explanation:

5+10+15...+100

=> (5+100) + (10 +95) + ——— (45 + 60) + (50 +55)

=> 105 + 105 —— (10 times)

=> 1050

Answered by kpranavachanta
2

a=5

l=100

d=10-5=5

n=?

Sn=?

l=a+(n-1)d

100=5+(n-1)5

95=5n-5

100=5n

n=20

Sn=n/2[a+l]

Sn=10[5+100]

Sn=105(10)

Sn=1050

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