Question

find the sum of first 30 multiples of 23​

Answer 1

Answer:

10,695

Step-by-step explanation:

you can use the formula nr(r+1)/2

where n is the no and r is no.of times multiple

Answer 2

Answer:

$10695$

Step-by-step explanation:

To Find : find the sum of first 30 multiples of 23​

Solution :

AP = 23,46,.......,690

a = first term = 23

$a_n=690$

Sum of first 30 terms = $\frac{n}{2}(a+a_n)$

                                   = $\frac{30}{2}(23+690)$

                                   = $10695$

Hence the sum of first 30 multiples of 23​ is $10695$