Question

Find the sum of first 16 multiples of 3 ​

Answer 1

Answer:

408

Step-by-step explanation:

There are two steps:

1.) 3+6+9+12+15+18+21+24+27+30+33+36+39+42+45+48 = 408

2.) Sn = n/2 {2a + (n-1) × d}

S16 = 16/2 {2×3 + (16-1) × 3}

S16 = 8 (6+45)

S16 = 8 × 51

S16 = 408

Answer 2

Hope this helps........