Question

1+1.5+2.0+2.5-----------------s16=

Answer 1

Answer:

263.5

Step-by-step explanation:

1+1.5+2+2.5+3+3.5+4+-----------s16=263.5

Answer 2

First term = 1 , Common difference = 0.5

n = 16

s = n (2a +(n-1) d)

2

s= 16 (2×1 + (16-1) 0.5)

2

s= 8 (2 +15× 0.5)

s = 8 (2+7.5)

s = 8 × 9.5. = 76