Question

find the sum of 1+2+3+......+60​

Answer 1

Step-by-step explanation:

Hello......

Remember...

Sum of first n terms is $\frac{n \times (n+1)}{2}$

Toh hum log yeh formula use krenge

Dekho aisa questions aise hi solve hota hai thekk hai?

$1 + 2 + 3 + 4 ......... + 59 + 60 \\ \\ \frac{n(n + 1)}{2} = \frac{60(61)}{2} = 30 \times 61 = 1830$

Toh yeh rha apna questions ka answer

Answer 2

Answer:

Sn=n/2[2a+(n-1)d]

Sn=60/2[2*1+59]

Sn=30(61)

Sn=1830

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