Question

can anyone solve this please, need an urgent help

Answer 1

Ok here is the answer

Please mark it as brainliest it would help me

Answer 2

heya ,
it's Aastha....

In AP :
a = 0.5 π , d = 0.5 π , n = 13

then,

◆ Sn = n/2 { 2a + (n-1)d}

◆ S13 = 13 /2 { π + 6π}

◆S13=. 13/2 × 7π

◆ S13= 143 .

I hope it help you........